diff --git a/bindings/python/pyproject.toml b/bindings/python/pyproject.toml
index f823b98b7..6e441a372 100644
--- a/bindings/python/pyproject.toml
+++ b/bindings/python/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = ['typing-extensions >=4.6.0,!=4.7.0']
 dynamic = ['readme', 'version']
 
 [project.optional-dependencies]
-dev = ["mypy==1.11.0", "pytest==8.3.1", "pytest-cov==5.0.0", "ruff==0.5.4"]
+dev = ["mypy==1.11.0", "pytest==8.3.1", "pytest-cov==5.0.0", "ruff==0.5.4", "coverage==7.6.1"]
 
 [project.urls]
 Homepage = "https://github.com/penberg/limbo"
diff --git a/bindings/python/requirements-dev.txt b/bindings/python/requirements-dev.txt
index a7a8d1a8d..ea68f9ec1 100644
--- a/bindings/python/requirements-dev.txt
+++ b/bindings/python/requirements-dev.txt
@@ -1,5 +1,7 @@
 coverage==7.6.1
-    # via pytest-cov
+    # via
+    #   limbo (pyproject.toml)
+    #   pytest-cov
 iniconfig==2.0.0
     # via pytest
 mypy==1.11.0