diff --git a/pyproject.toml b/pyproject.toml
index 7e0fcba83..7d8f64489 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers = ["Topic :: Scientific/Engineering :: Artificial Intelligence"]
 [tool.poetry.dependencies]
 python = "^3.10"
 transformer-lens = "^2.0.0"
-transformers = "^4.38.1"
+transformers = ">=4.38.1,<6.0.0"
 plotly = "^5.19.0"
 plotly-express = "^0.4.1"
 matplotlib = "^3.8.3"