diff --git a/pyproject.toml b/pyproject.toml
index c0dfb042..40240c03 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,12 +89,12 @@ testing = [
     "pyHanko[testing-basic,pkcs11,xmp,opentype,image-support,async-http,extra-pubkey-algs]",
     "pyHanko[etsi];python_version>=\"3.8\"",
     "pytest-aiohttp~=1.0.4",
-    "certomancer-csc-dummy==0.2.2",
+    "certomancer-csc-dummy==0.2.3",
 ]
 live-test = [
     "pyHanko[testing-basic,xmp,async-http,extra-pubkey-algs]",
     "pytest-aiohttp~=1.0.4",
-    "certomancer-csc-dummy==0.2.2",
+    "certomancer-csc-dummy==0.2.3",
     "certomancer[web-api,pkcs12]>=0.11.0,<0.12.0",
     "pytest-cov>=4.0,<4.2",
 ]