diff --git a/eng/common/testproxy/target_version.txt b/eng/common/testproxy/target_version.txt
index d649bab76c5..151749f5d2a 100644
--- a/eng/common/testproxy/target_version.txt
+++ b/eng/common/testproxy/target_version.txt
@@ -1 +1 @@
-1.0.0-dev.20251022.1
+1.0.0-dev.20251209.1