diff --git a/aiserver.py b/aiserver.py
index 9b9a1c76..05fa7dae 100644
--- a/aiserver.py
+++ b/aiserver.py
@@ -1242,7 +1242,7 @@ def patch_transformers():
 
 
     # Fix a bug in OPTForCausalLM where self.lm_head is the wrong size
-    if(packaging.version.parse("4.19.0.dev0") <= packaging.version.parse(transformers_version) <= packaging.version.parse("4.19.2")):
+    if(packaging.version.parse("4.19.0.dev0") <= packaging.version.parse(transformers_version) < packaging.version.parse("4.20.0")):
         try:
             from transformers import OPTForCausalLM, OPTModel
         except ImportError: