diff --git a/python-core/build_ext.py b/python-core/build_ext.py
index 6d98205..031784e 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-v0.20.1",
+        "c-core-v0.20.3",
         "./c-core",
         CMAKE_OPTS + CPM_OPTS,
     ),
diff --git a/python-core/pyproject.toml b/python-core/pyproject.toml
index 9e205c8..9b3b845 100644
--- a/python-core/pyproject.toml
+++ b/python-core/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "deciphon-core"
-version = "0.23.0"
+version = "0.23.1"
 description = "Python wrapper around the Deciphon C library"
 authors = ["Danilo Horta <horta@ebi.ac.uk>"]
 license = "MIT"