diff --git a/conda-environment.yml b/conda-environment.yml
index 3eef7897225..abdc4df3e8f 100644
--- a/conda-environment.yml
+++ b/conda-environment.yml
@@ -9,13 +9,14 @@ dependencies:
   - graphviz  # for static graphing
   - jinja2 ==2.11.0,<2.12
   - metomi-isodatetime >=1!2.0.2, <1!2.1.0
-  - protobuf >=3.15.0,<3.16.0
+  - protobuf >=3.19.0,<3.20.0
   - psutil >=5.6.0
   - python
   - pyuv >=1.4.0,<1.5.0
-  - pyzmq >=19.0.0,<19.1.0
+  - pyzmq >=22,<23
   - setuptools >=49
   - urwid >=2,<3
+
 # optional dependencies
   #- empy >=3.3,<3.4
   #- pandas >=1.0,<2
diff --git a/setup.cfg b/setup.cfg
index 56f57b55a7c..e2d660d7bbb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -65,10 +65,10 @@ install_requires =
     graphene>=2.1,<3
     jinja2==2.11.*
     metomi-isodatetime>=1!2.0.2, <1!2.1.0
-    protobuf==3.15.*
+    protobuf==3.19.*
     psutil>=5.6.0
     pyuv==1.4.*
-    pyzmq==19.0.*
+    pyzmq==22.*
     setuptools>=49
     urwid==2.*