diff --git a/pyproject.toml b/pyproject.toml
index 8e7ba8726..42895ce77 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ train = ["keras-tuner"]
 server = ["bottle", "requests"]
 gui = [
     "birdnet-analyzer[train,embeddings]",
-    "gradio>=5.46",
+    "gradio>=5.46, <6.0",
     "pywebview>=6.0",
     "pyobjc-framework-UniformTypeIdentifiers;platform_system=='Darwin'", # macOS only, until pywebview adds it as dependency
     "plotly[express]",