diff --git a/.dockerignore b/.dockerignore
index 6415e08b..163278ea 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -12,7 +12,10 @@ ocrd-all-module-dir.json
 opencv-python
 # only needed for testing:
 # (but we may want that, only 169 MB)
-# **/assets/*
+**/assets/*
+# recursive submodules, too deep
+ocrd_tesserocr/repo/tesseract/test/*
+ocrd_tesserocr/repo/tesseract/unittest/third_party/googletest/*
 # avoid interference with host-local builds:
 **/build/*
 */.eggs/*
diff --git a/.gitmodules b/.gitmodules
index b3efb98a..e63bf021 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,24 +16,20 @@
 [submodule "ocrd_olena"]
 	path = ocrd_olena
 	url = https://github.com/OCR-D/ocrd_olena.git
+        shallow = true
 [submodule "ocrd_segment"]
 	path = ocrd_segment
 	url = https://github.com/OCR-D/ocrd_segment.git
 [submodule "ocrd_tesserocr"]
 	path = ocrd_tesserocr
 	url = https://github.com/OCR-D/ocrd_tesserocr.git
-[submodule "tesserocr"]
-	path = tesserocr
-	url = https://github.com/sirfz/tesserocr.git
+        shallow = true
 [submodule "dinglehopper"]
 	path = dinglehopper
 	url = https://github.com/qurator-spk/dinglehopper.git
 [submodule "cor-asv-ann"]
 	path = cor-asv-ann
 	url = https://github.com/ASVLeipzig/cor-asv-ann.git
-[submodule "tesseract"]
-	path = tesseract
-	url = https://github.com/tesseract-ocr/tesseract.git
 [submodule "format-converters"]
 	path = format-converters
 	url = https://github.com/OCR-D/format-converters.git
@@ -55,6 +51,7 @@
 [submodule "opencv-python"]
 	path = opencv-python
 	url = https://github.com/skvark/opencv-python.git
+        shallow = true
 [submodule "workflow-configuration"]
 	path = workflow-configuration
 	url = https://github.com/bertsky/workflow-configuration.git
diff --git a/Dockerfile b/Dockerfile
index c00c2bc4..94e1a07f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -109,10 +109,14 @@ RUN echo "pip install -U pip setuptools wheel" >> docker.sh
 RUN echo "hash -r" >> docker.sh
 # build/install all tools of the requested modules:
 RUN echo "make $PARALLEL all" >> docker.sh
+# preinstall ocrd-all-tool.json and ocrd-all-module-dir.json
+RUN echo "make ocrd-all-tool.json ocrd-all-module-dir.json" >> docker.sh
 # remove unneeded automatic deps and clear pkg cache
 RUN echo "apt-get -y remove automake autoconf libtool pkg-config g++ && apt-get -y clean" >> docker.sh
 # clean-up some temporary files (git repos are also installation targets and must be kept)
-RUN echo "make -i clean-olena clean-tesseract; rm -fr /.cache" >> docker.sh
+RUN echo "make -i clean-tesseract" >> docker.sh
+RUN echo "make -i clean-olena" >> docker.sh
+RUN echo "rm -fr /.cache" >> docker.sh
 # run the script in one layer/step (to minimise image size)
 # (and export all variables)
 RUN set -a; bash docker.sh
@@ -122,9 +126,6 @@ RUN ldconfig
 RUN make -j4 check CHECK_HELP=1
 RUN if echo $BASE_IMAGE | fgrep -q cuda; then make fix-cuda; fi
 
-# preinstall ocrd-all-tool.json and ocrd-all-module-dir.json
-RUN make ocrd-all-tool.json ocrd-all-module-dir.json
-
 # as discussed in #378, we do not want to manage more than one resource location
 # to mount for model persistence; with named volumes, the preinstalled models
 # will be copied to the host and complemented by downloaded models; tessdata
@@ -136,6 +137,8 @@ RUN ln -s $XDG_CONFIG_HOME/ocrd-tesserocr-recognize $XDG_DATA_HOME/tessdata
 # finally, alias/symlink all ocrd-resources to /models for shorter mount commands
 RUN mkdir -p $XDG_CONFIG_HOME
 RUN mv $XDG_CONFIG_HOME /models && ln -s /models $XDG_CONFIG_HOME
+# ensure unprivileged users can download models, too
+RUN chmod go+rwx /models
 
 # remove (dated) security workaround preventing use of
 # ImageMagick's convert on PDF/PS/EPS/XPS:
diff --git a/Makefile b/Makefile
index c39c9fce..a935a330 100644
--- a/Makefile
+++ b/Makefile
@@ -22,8 +22,6 @@ endif
 endif
 GIT_RECURSIVE = # --recursive
 GIT_DEPTH = # --depth 1 or --single-branch
-# Required and optional Tesseract models.
-ALL_TESSERACT_MODELS = eng equ osd $(TESSERACT_MODELS)
 
 # directory for virtual Python environment
 # (but re-use if already active); overridden
@@ -132,12 +130,8 @@ Targets (system dependencies, may need root privileges):
 Targets (build and installation into venv):
 	all: install all executables of all modules
 	ocrd: only install the virtual environment and OCR-D/core packages
-	install-tesseract: only build and install Tesseract (with TESSERACT_MODELS)
-	install-tesseract-training: also build and install Tesseract training tools
 	fix-cuda: workaround for non-conflicting CUDA libs after installation
 	clean: remove the virtual environment directory, and make clean-*
-	clean-tesseract: remove the build directory for tesseract
-	clean-olena: remove the build directory for ocrd_olena
 
 Targets (testing):
 	check: verify that all executables are runnable and the venv is consistent
@@ -165,8 +159,6 @@ Variables:
 	PYTHON: name of the Python binary (also used for target `deps-ubuntu` unless set to `python`)
 	PIP_OPTIONS: extra options for the `pip install` command like `-q` or `-v` or `-e`
 	CHECK_HELP: set to `1` to also check each executable can generate help output
-	TESSERACT_MODELS: list of additional models/languages to download for Tesseract. Default: "$(ALL_TESSERACT_MODELS)"
-	TESSERACT_CONFIG: command line options for Tesseract `configure`. Default: "$(TESSERACT_CONFIG)"
 EOF
 endef
 export HELP
@@ -457,24 +449,14 @@ endif
 endif
 
 ifneq ($(filter ocrd_tesserocr, $(OCRD_MODULES)),)
+ocrd_tesserocr: GIT_RECURSIVE = --recursive
 install-models: install-models-tesseract
 .PHONY: install-models-tesseract
 install-models-tesseract:
 	. $(ACTIVATE_VENV) && ocrd resmgr download ocrd-tesserocr-recognize '*'
 
 OCRD_EXECUTABLES += $(OCRD_TESSEROCR)
-# only add custom PPA when not building tesseract from source
-ifeq ($(filter tesseract, $(OCRD_MODULES)),)
 deps-ubuntu-modules: ocrd_tesserocr
-# convert Tesseract model names into Ubuntu/Debian pkg names
-# (does not work with names under script/ though)
-CUSTOM_DEPS += $(filter-out tesseract-ocr-equ,$(subst _,-,$(ALL_TESSERACT_MODELS:%=tesseract-ocr-%)))
-CUSTOM_DEPS += libarchive-dev
-else
-# tesserocr must wait for tesseract in parallel builds.
-$(SHARE)/tesserocr: $(BIN)/tesseract
-endif
-
 OCRD_TESSEROCR := $(BIN)/ocrd-tesserocr-binarize
 OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-crop
 OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-deskew
@@ -483,19 +465,36 @@ OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-segment
 OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-segment-line
 OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-segment-region
 OCRD_TESSEROCR += $(BIN)/ocrd-tesserocr-segment-word
-$(call multirule,$(OCRD_TESSEROCR)): ocrd_tesserocr $(SHARE)/tesserocr $(BIN)/ocrd
-	$(pip_install)
-
-endif
+OCRD_TESSEROCR += $(BIN)/tesseract
+TESSTRAIN_EXECUTABLES =
+TESSTRAIN_EXECUTABLES += $(BIN)/ambiguous_words
+TESSTRAIN_EXECUTABLES += $(BIN)/classifier_tester
+TESSTRAIN_EXECUTABLES += $(BIN)/cntraining
+TESSTRAIN_EXECUTABLES += $(BIN)/combine_lang_model
+TESSTRAIN_EXECUTABLES += $(BIN)/combine_tessdata
+TESSTRAIN_EXECUTABLES += $(BIN)/dawg2wordlist
+TESSTRAIN_EXECUTABLES += $(BIN)/lstmeval
+TESSTRAIN_EXECUTABLES += $(BIN)/lstmtraining
+TESSTRAIN_EXECUTABLES += $(BIN)/merge_unicharsets
+TESSTRAIN_EXECUTABLES += $(BIN)/mftraining
+TESSTRAIN_EXECUTABLES += $(BIN)/set_unicharset_properties
+TESSTRAIN_EXECUTABLES += $(BIN)/shapeclustering
+TESSTRAIN_EXECUTABLES += $(BIN)/text2image
+TESSTRAIN_EXECUTABLES += $(BIN)/unicharset_extractor
+TESSTRAIN_EXECUTABLES += $(BIN)/wordlist2dawg
+$(call multirule,$(OCRD_TESSEROCR)): ocrd_tesserocr $(BIN)/ocrd
+	$(MAKE) -C $< install # install-tesseract-training
 
-ifneq ($(filter tesserocr, $(OCRD_MODULES)),)
-$(SHARE)/tesserocr: tesserocr | $(ACTIVATE_VENV) $(SHARE)
-	$(pip_install)
-else
-$(SHARE)/tesserocr: | $(ACTIVATE_VENV) $(SHARE)
-	. $(ACTIVATE_VENV) && $(SEMPIP) pip install $(PIP_OPTIONS_E) tesserocr
-	@touch $@
 endif
+clean: clean-tesseract
+clean-tesseract: ocrd_tesserocr
+	-$(MAKE) -C $< $@ clean-assets
+# (keep these rules merely for backwards compatibility)
+install-tesseract: ocrd_tesserocr $(BIN)/tesseract
+install-tesseract-training: ocrd_tesserocr $(TESSTRAIN_EXECUTABLES)
+install-tesseract install-tesseract-training:
+	$(MAKE) -C $< $@
+.PHONY: clean-tesseract install-tesseract install-tesseract-training
 
 ifneq ($(filter ocrd_cis, $(OCRD_MODULES)),)
 install-models: install-models-ocropus
@@ -770,99 +769,8 @@ $(OCRD_EXECUTABLES:%=%-check):
 .PHONY: $(OCRD_EXECUTABLES:$(BIN)/%=%)
 $(OCRD_EXECUTABLES:$(BIN)/%=%): %: $(BIN)/%
 
-ifneq ($(filter tesseract, $(OCRD_MODULES)),)
-# Tesseract.
-
-# when not installing via PPA, we must cope without ocrd_tesserocr's deps-ubuntu-modules
-CUSTOM_DEPS += automake ca-certificates g++ libtool make
-ifeq ($(shell type apt-cache >/dev/null 2>&1 && apt-cache search --names-only '^pkgconf$$'),)
-# Debian 11, Ubuntu 22.04 or other old distributions.
-CUSTOM_DEPS += pkg-config
-else
-# Debian 12, Ubuntu 23.04 or other new distributions.
-CUSTOM_DEPS += pkgconf
-endif
-# Required library.
-CUSTOM_DEPS += libleptonica-dev
-# Optional libraries for enhanced functionality.
-CUSTOM_DEPS += libarchive-dev libcurl4-nss-dev
-# Optional library for training tools.
-CUSTOM_DEPS += libpango1.0-dev
-
 XDG_DATA_HOME ?= $(if $(HOME),$(HOME)/.local/share,/usr/local/share)
 DEFAULT_RESLOC ?= $(XDG_DATA_HOME)/ocrd-resources
-TESSDATA = $(VIRTUAL_ENV)/share/tessdata/
-TESSDATA_RELEASE = 4.1.0
-TESSDATA_URL := https://github.com/tesseract-ocr/tessdata_fast/raw/$(TESSDATA_RELEASE)
-TESSERACT_TRAINEDDATA = $(ALL_TESSERACT_MODELS:%=$(TESSDATA)/%.traineddata)
-
-stripdir = $(patsubst %/,%,$(dir $(1)))
-
-# Install Tesseract with models.
-.PHONY: install-tesseract
-install-tesseract: $(BIN)/tesseract $(TESSERACT_TRAINEDDATA)
-all: install-tesseract
-
-# Convenience shortcut without the full path:
-%.traineddata: $(TESSDATA)/%.traineddata
-	$(MAKE) $^
-script/%.traineddata: $(TESSDATA)/script/%.traineddata
-	$(MAKE) $^
-
-# Default rule for traineddata models.
-$(TESSDATA)/%.traineddata:
-	@mkdir -p $(dir $@)
-	$(call WGET,$@,$(TESSDATA_URL)/$(notdir $@)) || \
-	$(call WGET,$@,$(TESSDATA_URL)/$(notdir $(call stripdir,$@))/$(notdir $@)) || \
-		{ $(RM) $@; false; }
-
-tesseract/Makefile.in: tesseract
-	cd tesseract && ./autogen.sh
-
-# Build and install Tesseract.
-TESSERACT_CONFIG ?= --disable-openmp --disable-shared CXXFLAGS="-g -O2 -fPIC"
-$(BIN)/tesseract: tesseract/Makefile.in
-	mkdir -p $(VIRTUAL_ENV)/build/tesseract
-	cd $(VIRTUAL_ENV)/build/tesseract && $(CURDIR)/tesseract/configure --prefix="$(VIRTUAL_ENV)" $(TESSERACT_CONFIG)
-	cd $(VIRTUAL_ENV)/build/tesseract && $(MAKE) install
-
-# Build and install Tesseract training tools.
-
-TESSTRAIN_EXECUTABLES =
-TESSTRAIN_EXECUTABLES += $(BIN)/ambiguous_words
-TESSTRAIN_EXECUTABLES += $(BIN)/classifier_tester
-TESSTRAIN_EXECUTABLES += $(BIN)/cntraining
-TESSTRAIN_EXECUTABLES += $(BIN)/combine_lang_model
-TESSTRAIN_EXECUTABLES += $(BIN)/combine_tessdata
-TESSTRAIN_EXECUTABLES += $(BIN)/dawg2wordlist
-TESSTRAIN_EXECUTABLES += $(BIN)/lstmeval
-TESSTRAIN_EXECUTABLES += $(BIN)/lstmtraining
-TESSTRAIN_EXECUTABLES += $(BIN)/merge_unicharsets
-TESSTRAIN_EXECUTABLES += $(BIN)/mftraining
-TESSTRAIN_EXECUTABLES += $(BIN)/set_unicharset_properties
-TESSTRAIN_EXECUTABLES += $(BIN)/shapeclustering
-TESSTRAIN_EXECUTABLES += $(BIN)/text2image
-TESSTRAIN_EXECUTABLES += $(BIN)/unicharset_extractor
-TESSTRAIN_EXECUTABLES += $(BIN)/wordlist2dawg
-
-.PHONY: install-tesseract-training
-install-tesseract-training: $(TESSTRAIN_EXECUTABLES)
-
-$(call multirule,$(TESSTRAIN_EXECUTABLES)): tesseract/Makefile.in
-	mkdir -p $(VIRTUAL_ENV)/build/tesseract
-	$(MAKE) -C $(VIRTUAL_ENV)/build/tesseract training-install
-
-# offer abbreviated forms (just the CLI name in the PATH,
-# without its directory):
-.PHONY: $(TESSTRAIN_EXECUTABLES:$(BIN)/%=%)
-$(TESSTRAIN_EXECUTABLES:$(BIN)/%=%): %: $(BIN)/%
-
-endif
-
-clean: clean-tesseract
-.PHONY: clean-tesseract
-clean-tesseract:
-	$(RM) -r $(VIRTUAL_ENV)/build/tesseract
 
 # do not delete intermediate targets:
 .SECONDARY:
@@ -932,10 +840,10 @@ dockers: docker-minimum docker-minimum-cuda docker-medium docker-medium-cuda doc
 # (so components can be updated via git from the container alone)
 docker-%: PIP_OPTIONS = -e
 
-# Minimum-size selection: use Ocropy binarization, use Tesseract from PPA
-docker-mini%: DOCKER_MODULES := core ocrd_cis ocrd_fileformat ocrd_im6convert ocrd_pagetopdf ocrd_repair_inconsistencies ocrd_tesserocr ocrd_wrap tesserocr workflow-configuration ocrd_olahd_client
-# Medium-size selection: add Olena binarization and Calamari, use Tesseract from git, add evaluation
-docker-medi%: DOCKER_MODULES := core cor-asv-ann dinglehopper docstruct format-converters nmalign ocrd_calamari ocrd_cis ocrd_fileformat ocrd_im6convert ocrd_keraslm ocrd_olahd_client ocrd_olena ocrd_pagetopdf ocrd_repair_inconsistencies ocrd_segment ocrd_tesserocr ocrd_wrap tesseract tesserocr workflow-configuration
+# Minimum-size selection: use Ocropy binarization, use Tesseract from git
+docker-mini%: DOCKER_MODULES := core ocrd_cis ocrd_fileformat ocrd_im6convert ocrd_pagetopdf ocrd_repair_inconsistencies ocrd_tesserocr ocrd_wrap workflow-configuration ocrd_olahd_client
+# Medium-size selection: add Olena binarization and Calamari, add evaluation
+docker-medi%: DOCKER_MODULES := core cor-asv-ann dinglehopper docstruct format-converters nmalign ocrd_calamari ocrd_cis ocrd_fileformat ocrd_im6convert ocrd_keraslm ocrd_olahd_client ocrd_olena ocrd_pagetopdf ocrd_repair_inconsistencies ocrd_segment ocrd_tesserocr ocrd_wrap workflow-configuration
 # Maximum-size selection: use all modules
 docker-maxi%: DOCKER_MODULES := $(OCRD_MODULES)
 
diff --git a/README.md b/README.md
index c4c15096..cc992f34 100644
--- a/README.md
+++ b/README.md
@@ -43,8 +43,6 @@ in the current shell environment via PATH and PYTHONHOME.)
        * [<em>TMPDIR</em>](#tmpdir)
        * [<em>PIP_OPTIONS</em>](#pip_options)
        * [<em>GIT_RECURSIVE</em>](#git_recursive)
-       * [<em>TESSERACT_MODELS</em>](#tesseract_models)
-       * [<em>TESSERACT_CONFIG</em>](#tesseract_config)
     * [Examples](#examples)
     * [Results](#results)
     * [Persistent configuration](#persistent-configuration)
@@ -115,7 +113,8 @@ or newer, then just install its development package:
    Otherwise, recent Tesseract packages for Ubuntu are available via PPA
    [alex-p](https://launchpad.net/~alex-p/+archive/ubuntu/tesseract-ocr-devel).
 
-   Alternatively, the latest version of Tesseract can also be built as a module locally.
+   If no Tesseract is installed, a recent version will be downloaded and built as part
+   of the `ocrd_tesserocr` module rules.
 
 * Other modules will have additional system dependencies.
 
@@ -272,30 +271,20 @@ Add extra options to the `pip install` command like `-q` or `-v` or `-e`.
 
 Set to `--recursive` to checkout/update all modules recursively. (This usually installs additional tests and models.)
 
-#### _TESSERACT_MODELS_
-
-Add more models to the minimum required list of languages (`eng equ osd`) to install along with Tesseract.
-
-> **Note**: this only affects `make install-tesseract` (or `all`), but is independent of the `install-models` step. 
-> (The latter delegates to `ocrd resmgr download`, which fetches all registered resources.)
-
-#### _TESSERACT_CONFIG_
-
-Set `configure` options for building Tesseract from source (`--disable-openmp --disable-shared CXXFLAGS="-g -O2 -fPIC"`).
-
 ### Examples
 
 To build the latest Tesseract locally, run this command first:
 
     # Get code, build and install Tesseract with the default English model.
     make install-tesseract
+    make ocrd-tesserocr-recognize
 
 Optionally install additional Tesseract models.
 
     # Download models from tessdata_fast into the venv's tessdata directory.
-    make frk.traineddata
-    make script/Latin.traineddata
-    make script/Fraktur.traineddata
+    ocrd resmgr download ocrd-tesserocr-recognize frk.traineddata
+    ocrd resmgr download ocrd-tesserocr-recognize Latin.traineddata
+    ocrd resmgr download ocrd-tesserocr-recognize Fraktur.traineddata
 
 Optionally install Tesseract training tools.
 
@@ -311,7 +300,7 @@ Running `make modules` downloads/updates all modules.
 
 Running `make all` additionally installs the executables from all modules.
 
-Running `make all OCRD_MODULES="core tesseract ocrd_tesserocr ocrd_cis"` installs only the executables from these modules.
+Running `make all OCRD_MODULES="core ocrd_tesserocr ocrd_cis"` installs only the executables from these modules.
 
 ### Results
 
@@ -337,7 +326,7 @@ So you don't have to type (and memorise) them on the command line or shell envir
 For example, its content could be:
 ```make
 # restrict everything to a subset of modules
-OCRD_MODULES = core ocrd_im6convert ocrd_cis ocrd_tesserocr tesserocr tesseract
+OCRD_MODULES = core ocrd_im6convert ocrd_cis ocrd_tesserocr
 
 # use a non-default path for the virtual environment
 VIRTUAL_ENV = $(CURDIR)/.venv
@@ -348,12 +337,6 @@ PIP_OPTIONS = -e
 # use non-default temporary storage
 TMPDIR = $(CURDIR)/.tmp
 
-# install more languages/models for Tesseract
-TESSERACT_MODELS = deu frk script/Fraktur script/Latin
-
-# install all of Tesseract's submodules to support unit tests and training tools, too
-tesseract: GIT_RECURSIVE = --recursive
-
 # avoid automatic submodule updates
 NO_UPDATE = 1
 ```
@@ -404,7 +387,6 @@ This table lists which tag contains which module:
 | ocrd_repair_inconsistencies | ☑         | ☑        | ☑         |
 | ocrd_tesserocr              | ☑         | ☑        | ☑         |
 | ocrd_wrap                   | ☑         | ☑        | ☑         |
-| tesserocr                   | ☑         | ☑        | ☑         |
 | workflow-configuration      | ☑         | ☑        | ☑         |
 | cor-asv-ann                 | -         | ☑        | ☑         |
 | dinglehopper                | -         | ☑        | ☑         |
@@ -416,12 +398,11 @@ This table lists which tag contains which module:
 | ocrd_neat                   | -         | ☑        | ☑         |
 | ocrd_olena                  | -         | ☑        | ☑         |
 | ocrd_segment                | -         | ☑        | ☑         |
-| tesseract                   | -         | ☑        | ☑         |
 | ocrd_anybaseocr             | -         | -        | ☑         |
 | ocrd_detectron2             | -         | -        | ☑         |
 | ocrd_doxa                   | -         | -        | ☑         |
 | ocrd_kraken                 | -         | -        | ☑         |
-| ocrd_typegroups_classifier  | -         | -        | ☑         |
+| ocrd_froc                   | -         | -        | ☑         |
 | sbb_binarization            | -         | -        | ☑         |
 | cor-asv-fst                 | -         | -        | -         |
 | ocrd_ocropy                 | -         | -        | -         |
@@ -452,12 +433,7 @@ This repo offers solutions to the following problems with OCR-D integration.
 
 ### No published/recent version on PyPI
 
-The following Python modules need an installation from code for different reasons:
-
-- cor-asv-ann (not available in PyPI)
-- cor-asv-fst (not available in PyPI)
-- dinglehopper (not available in PyPI)
-- tesserocr (too old in PyPI)
+Python modules which are not available in PyPI:
 
 _(Solved by installation from source.)_
 
@@ -469,14 +445,14 @@ Modules may require mutually exclusive sets of dependent packages.
 `pip` does not even stop or resolve conflicts – it merely warns!
 
 - Tensorflow:
-   * version 2 (required by ocrd_calamari, ocrd_anybaseocr and ocrd_pc_segmentation)
-   * version 1 (required by cor-asv-ann and ocrd_keraslm)
+   * version 2 (required by `ocrd_calamari`, `ocrd_anybaseocr` and `eynollah`)
+   * version 1 (required by `cor-asv-ann`, `ocrd_segment` and  `ocrd_keraslm`)
    
    The temporary solution is to require different package names:
    - `tensorflow>=2`
    - `tensorflow-gpu==1.15.*`
    
-   Both cannot be installed in parallel in different versions, and usually also depend on different versions of CUDA toolkit.)
+   Both cannot be installed in parallel in different versions, and usually also depend on different versions of CUDA toolkit.
    
 - OpenCV:
    * `opencv-python-headless` (required by core and others, avoids pulling in X11 libraries)
@@ -495,9 +471,7 @@ _(Solved by managing and delegating to different subsets of venvs.)_
 
 ### System requirements
 
-Not all modules advertise their system package requirements via `make deps-ubuntu`.
-
-- `tesseract` (when installing from source not PPA): depends on `libleptonica-dev` etc
+Modules which do not advertise their system package requirements via `make deps-ubuntu`:
 
 _(Solved by maintaining these requirements under `deps-ubuntu` here.)_
 
diff --git a/ocrd_tesserocr b/ocrd_tesserocr
index 08a020fd..d5724ce0 160000
--- a/ocrd_tesserocr
+++ b/ocrd_tesserocr
@@ -1 +1 @@
-Subproject commit 08a020fdd80ef8f9658bb4dce2057b0e97dd26ac
+Subproject commit d5724ce0f8441d6db6601690123b7bf9e99eaf7c
diff --git a/tesseract b/tesseract
deleted file mode 160000
index becd3954..00000000
--- a/tesseract
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit becd395490e01749e1a3f141e3c7c7a59856d7f2
diff --git a/tesserocr b/tesserocr
deleted file mode 160000
index f900cbd9..00000000
--- a/tesserocr
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit f900cbd9a679e5b0d27c46b7af20c0c578ef6163
diff --git a/workflow-configuration b/workflow-configuration
index 8418b3fc..bd149f83 160000
--- a/workflow-configuration
+++ b/workflow-configuration
@@ -1 +1 @@
-Subproject commit 8418b3fcd50d81631f378cbe194e4291b31a0809
+Subproject commit bd149f831a6bc5227e2b17f623c33221f307ff78