diff --git a/origami/clients/rtu.py b/origami/clients/rtu.py
index c08f9a5..bab3570 100644
--- a/origami/clients/rtu.py
+++ b/origami/clients/rtu.py
@@ -319,7 +319,7 @@ def cell_ids(self):
     @property
     def kernel_pod_name(self) -> str:
         """Transform the file_id into the Pod name used to build the kernels/ RTU channel"""
-        return f'kernels/notebook-kernel-{self.file_id.hex[:15]}'
+        return f'kernels/notebook-kernel-{self.file_id.hex[:20]}'
 
     def send(self, msg: RTURequest):
         """