diff --git a/pbuilderrc b/pbuilderrc
index 8150b3c..35727b7 100644
--- a/pbuilderrc
+++ b/pbuilderrc
@@ -1,9 +1,9 @@
 # Codenames for Debian suites according to their alias. Update these when
 # needed.
 UNSTABLE_CODENAME="sid"
-TESTING_CODENAME="bullseye"
-STABLE_CODENAME="buster"
-OLDSTABLE_CODENAME="stretch"
+TESTING_CODENAME="bookworm"
+STABLE_CODENAME="bullseye"
+OLDSTABLE_CODENAME="buster"
 STABLE_BACKPORTS_SUITE="$STABLE_CODENAME-backports"
 
 # Use cowbuilder