diff --git a/setup.py b/setup.py
index 5de70ff..db9d0ce 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@
     "Pygments==2.18.0",
     "pygments-markdown-lexer==0.1.0.dev39",  # sytax coloring to debug md
     "dulwich==0.22.1",  # python implementation of git
-    "deepmerge==1.1.1",
+    "deepmerge==2.0",
 ]
 
 if py_version < (3, 9):