diff --git a/pyproject.toml b/pyproject.toml
index 1c3fc702a..2e0be9c4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,11 +45,10 @@ dependencies = [
     "RestrictedPython>=7.0",  # Secure sandbox for user-supplied code
 ]
 
-
 [project.optional-dependencies]
 dev = [
     # Code formatting and linting
-    "ruff>=0.1.0",
+    "ruff>=0.15.0,<0.16.0",
     # Type checking
     "pyright>=1.1.350",
     "types-pyyaml>=6.0.0",