diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce34c619..dd0068e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 Documentation for rocRAND is available at
 [https://rocm.docs.amd.com/projects/rocRAND/en/latest/](https://rocm.docs.amd.com/projects/rocRAND/en/latest/)
 
+## (Unreleased) rocRAND-3.1.1 for ROCm 6.2.0
+
+## Fixes
+  * Fixed " unknown extension ?>" issue in scripts/config-tuning/select_best_config.py 
+    when using python version thats older than 3.11
+
 ## (Unreleased) rocRAND-3.1.0 for ROCm 6.2.0
 
 ### Additions
diff --git a/scripts/config-tuning/select_best_config.py b/scripts/config-tuning/select_best_config.py
index ce56cb0f..44e7ed1d 100755
--- a/scripts/config-tuning/select_best_config.py
+++ b/scripts/config-tuning/select_best_config.py
@@ -51,7 +51,9 @@ def guess_gcn_architecture(path: str, raw_json_data: dict):
     gb_per_s_series.name = 'gb_per_s'
 
     # Extract the groups of the regex match to a DataFrame
-    name_regex = r'^(?P<generator>\S+?)_(?P<distribution>uniform|normal|log_normal|poisson)_(?P<value_type>(?>unsigned_)?(?>int|short|char|long_long|float|half|double))_t(?P<block_size>\d+)_b(?P<grid_size>\d+)'
+    
+    name_regex = r'^(?P<generator>\S+?)_(?P<distribution>uniform|normal|log_normal|poisson)_(?P<value_type>(unsigned_)?(int|short|char|long_long|float|half|double))_t(?P<block_size>\d+)_b(?P<grid_size>\d+)'
+
     extracted_data = benchmark_data['name'].str.extract(name_regex)
     extracted_data['block_size'] = extracted_data['block_size'].astype(int)
     extracted_data['grid_size']  = extracted_data['grid_size'].astype(int)