diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ea72c540d..a7d634fbb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,12 +12,13 @@ jobs:
     with:
       upload_to_pypi: ${{ (github.event_name == 'release') && (github.event.action == 'released') }}
       targets: |
-        # Linux wheels
-        - cp3*-manylinux_x86_64
-        # MacOS wheels
-        - cp3*-macosx_x86_64
+        # Linux wheels (except python 313)
+        - cp31[!3]-manylinux_x86_64
+        # MacOS wheels (except python 313)
+        - cp31[!3]-macosx_x86_64
         # Until we have arm64 runners, we can't automatically test arm64 wheels
-#        - cp3*-macosx_arm64
+        # (except python 313)
+#        - cp31[!3]-macosx_arm64
       sdist: true
       test_command: python -c "from drizzlepac import cdriz"
     secrets:
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index acdf81c55..808ad33dd 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -19,7 +19,7 @@ formats:
 build:
   os: ubuntu-22.04
   tools:
-    python: "mambaforge-4.10"
+    python: "mambaforge-23.11"
 
 conda:
   environment: doc/.rtd-environment.yml
diff --git a/pyproject.toml b/pyproject.toml
index a2c9bf1f2..a2de87047 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "drizzlepac"
 description = " HST image combination using the drizzle algorithm to combine astronomical images, to model image distortion, to remove cosmic rays, and generally to improve the fidelity of data in the final image. "
-requires-python = ">=3.10"
+requires-python = ">=3.10,<3.13"
 authors = [
     { name = "Megan Sosey" },
     { name = "Warren Hack" },