diff --git a/pyproject.toml b/pyproject.toml
index 7dc7b3e7..11b0dd6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -160,7 +160,7 @@ all = [
     webrtc-voice-detector]""",
 ]
 docs = [
-  "jupyter-book==1.0.*,",
+  "jupyter-book==1.0.*",
   "matplotlib",
   "pandas>=1.4",
   "spacy>=3.4",