diff --git a/changelog.md b/changelog.md
index 2e18f36b..28277190 100644
--- a/changelog.md
+++ b/changelog.md
@@ -4,6 +4,7 @@ Upcoming (TBD)
 Internal
 --------
 * Improve robustness for flaky tests when publishing.
+* Set mypy version more strictly.
 
 
 1.41.2 (2025/11/24)
diff --git a/pyproject.toml b/pyproject.toml
index 29609d50..11b98be3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ all = [
 dev = [
     "behave>=1.2.6",
     "coverage>=7.2.7",
-    "mypy>=1.16.1",
+    "mypy~=1.18.1",
     "pexpect>=4.9.0",
     "pytest>=7.4.4",
     "pytest-cov>=4.1.0",