diff --git a/docs/clones.md b/docs/clones.md
index 8be449c..218942e 100644
--- a/docs/clones.md
+++ b/docs/clones.md
@@ -19,7 +19,7 @@ generated curricula, or included in the release bundle.
 
 #### **gnn** (Generalized Notation Notation)
 
-- **URL**: [github.com/ActiveInferenceInstitute/GeneralizedNotationNotation](https://github.com/ActiveInferenceInstitute/GeneralizedNotationNotation/)
+- **URL**: [github.com/ActiveInferenceInstitute/Generalized_Notation_Notation](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/)
 - **Destination**: `src/_clones/gnn`
 - **Purpose**: Generalized Notation Notation (GNN) project by the Active Inference Institute
 - **Integration**: Optional reference material; generated claims require independent source review
@@ -109,7 +109,7 @@ Use the integrated clone utility for consistent repository management:
 uv run start-clone --url https://github.com/ActiveInferenceInstitute/cognitive --dest src/_clones/cognitive --shallow
 
 # Generalized Notation Notation (GNN)
-uv run start-clone --url https://github.com/ActiveInferenceInstitute/GeneralizedNotationNotation --dest src/_clones/gnn --shallow
+uv run start-clone --url https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation --dest src/_clones/gnn --shallow
 
 # CEREBRUM
 uv run start-clone --url https://github.com/ActiveInferenceInstitute/CEREBRUM --dest src/_clones/cerebrum --shallow
diff --git a/src/repos/cloning.py b/src/repos/cloning.py
index c6cad26..4aea9e3 100644
--- a/src/repos/cloning.py
+++ b/src/repos/cloning.py
@@ -122,7 +122,7 @@ def get_predefined_repositories() -> Dict[str, RepoInfo]:
         ),
         "gnn": RepoInfo(
             name="gnn",
-            url="https://github.com/ActiveInferenceInstitute/GeneralizedNotationNotation/",
+            url="https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/",
             description="Generalized Notation Notation (GNN) by Active Inference Institute",
             category="active_inference",
             shallow=True,