diff --git a/poetry.lock b/poetry.lock
index a6df604..f769544 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -715,14 +715,14 @@ testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtuale
 
 [[package]]
 name = "pytest-icdiff"
-version = "0.6"
+version = "0.9"
 description = "use icdiff for better error messages in pytest assertions"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 groups = ["dev"]
 files = [
-    {file = "pytest-icdiff-0.6.tar.gz", hash = "sha256:e8f1ef4550a893b4f0a0ea7e7a8299b12ded72c086101d7811ddec0d85fd1bad"},
-    {file = "pytest_icdiff-0.6-py3-none-any.whl", hash = "sha256:93ba20b71e51db7abecf99abee8fd13abd9ba7934f8e6838d1c4f443b4fc56a7"},
+    {file = "pytest-icdiff-0.9.tar.gz", hash = "sha256:13aede616202e57fcc882568b64589002ef85438046f012ac30a8d959dac8b75"},
+    {file = "pytest_icdiff-0.9-py3-none-any.whl", hash = "sha256:efee0da3bd1b24ef2d923751c5c547fbb8df0a46795553fba08ef57c3ca03d82"},
 ]
 
 [package.dependencies]
@@ -913,4 +913,4 @@ termcolor = ">=3.2,<4.0"
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.13"
-content-hash = "0c21629e112c9a60ca87f6a5a970d44546a0f6340e259d5e50674ccb1a2ceb4b"
+content-hash = "cf5002d4ddf12abf84a5cb0d907ddd9a04667bfa866bd7cfbba592ad3e379f9a"
diff --git a/pyproject.toml b/pyproject.toml
index 39c90a4..61e44de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ packaging = "^24.2"
 [tool.poetry.group.dev.dependencies]
 pytest = "^8.4.2"
 pytest-cov = "^4.0.0"
-pytest-icdiff = "^0.6"
+pytest-icdiff = ">=0.6,<0.10"
 
 [build-system]
 requires = ["poetry-core"]