diff --git a/go.mod b/go.mod
index eeb3e792..73c5dbc6 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,10 @@
 module github.com/cert-manager/trust-manager
 
-go 1.22.0
+go 1.23.0
+
+// Added on bump to Go 1.23 as it seems like our current trust bundle contains certs with negative serial numbers.
+// See also https://pkg.go.dev/crypto/x509#ParseCertificate
+godebug x509negativeserial=1
 
 require (
 	github.com/go-logr/logr v1.4.2