diff --git a/pyproject.toml b/pyproject.toml
index 3dd5589..8a24ce4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ PyYAML = "^6.0.1"
 
 [tool.poetry.group.test.dependencies]
 pytest = "^7.3.1"
-pytest-icdiff = "^0.8"
+pytest-icdiff = ">=0.8,<0.10"
 tox = "^4.11.4"
 
 [tool.poetry.group.dev.dependencies]