diff --git a/python-core/build_ext.py b/python-core/build_ext.py
index ffe4d26..1fb4265 100644
--- a/python-core/build_ext.py
+++ b/python-core/build_ext.py
@@ -68,7 +68,7 @@ class Ext:
     Ext(
         "EBI-Metagenomics",
         "deciphon",
-        "c-core-v0.12.2",
+        "c-core-v0.12.3",
         "./c-core",
         CMAKE_OPTS + CPM_OPTS,
     ),