diff --git a/src/resources.py b/src/resources.py
index 8f002b1..62ba783 100644
--- a/src/resources.py
+++ b/src/resources.py
@@ -59,7 +59,7 @@ class SampleResource(Resource):
             return {'err_msg': 'Input JSON schema invalid'}, 417
 
         xeger = Xeger(limit=30)
-        generated_tag = xeger.xeger(r'^[a-zA-Z]+[0-9a-zA-Z_]*$')
+        generated_tag = xeger.xeger(r'^[a-zA-Z]+[0-9a-zA-Z_]*$')[:32]
 
         record = SampleMetadata(
             device_id=desc['device_id'],