diff --git a/.tools/envs/testenv-linux.yml b/.tools/envs/testenv-linux.yml
index dad1f9215..b2bcaac00 100644
--- a/.tools/envs/testenv-linux.yml
+++ b/.tools/envs/testenv-linux.yml
@@ -23,7 +23,7 @@ dependencies:
   - scipy>=1.2.1  # run, tests
   - sqlalchemy  # run, tests
   - seaborn  # dev, tests
-  - mypy>=1.11  # dev, tests
+  - mypy=1.11  # dev, tests
   - pyyaml  # dev, tests
   - jinja2  # dev, tests
   - annotated-types  # dev, tests
diff --git a/.tools/envs/testenv-numpy.yml b/.tools/envs/testenv-numpy.yml
index 0a1d55176..0241dc84e 100644
--- a/.tools/envs/testenv-numpy.yml
+++ b/.tools/envs/testenv-numpy.yml
@@ -21,7 +21,7 @@ dependencies:
   - scipy>=1.2.1  # run, tests
   - sqlalchemy  # run, tests
   - seaborn  # dev, tests
-  - mypy>=1.11  # dev, tests
+  - mypy=1.11  # dev, tests
   - pyyaml  # dev, tests
   - jinja2  # dev, tests
   - annotated-types  # dev, tests
diff --git a/.tools/envs/testenv-others.yml b/.tools/envs/testenv-others.yml
index 93849f10a..0998cf32f 100644
--- a/.tools/envs/testenv-others.yml
+++ b/.tools/envs/testenv-others.yml
@@ -21,7 +21,7 @@ dependencies:
   - scipy>=1.2.1  # run, tests
   - sqlalchemy  # run, tests
   - seaborn  # dev, tests
-  - mypy>=1.11  # dev, tests
+  - mypy=1.11  # dev, tests
   - pyyaml  # dev, tests
   - jinja2  # dev, tests
   - annotated-types  # dev, tests
diff --git a/.tools/envs/testenv-pandas.yml b/.tools/envs/testenv-pandas.yml
index 05f005c3d..48406a95f 100644
--- a/.tools/envs/testenv-pandas.yml
+++ b/.tools/envs/testenv-pandas.yml
@@ -21,7 +21,7 @@ dependencies:
   - scipy>=1.2.1  # run, tests
   - sqlalchemy  # run, tests
   - seaborn  # dev, tests
-  - mypy>=1.11  # dev, tests
+  - mypy=1.11  # dev, tests
   - pyyaml  # dev, tests
   - jinja2  # dev, tests
   - annotated-types  # dev, tests
diff --git a/environment.yml b/environment.yml
index 88882e7aa..06e0d88f8 100644
--- a/environment.yml
+++ b/environment.yml
@@ -32,7 +32,7 @@ dependencies:
   - sphinx-panels  # docs
   - sphinxcontrib-bibtex  # docs
   - seaborn  # dev, tests
-  - mypy>=1.11  # dev, tests
+  - mypy=1.11  # dev, tests
   - pyyaml  # dev, tests
   - jinja2  # dev, tests
   - furo  # dev, docs