diff --git a/go.mod b/go.mod
index 739b025..c0a1696 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/letsencrypt/crl-monitor
 
-go 1.25.5
+go 1.26.0
 
 require (
 	github.com/aws/aws-lambda-go v1.54.0
@@ -10,7 +10,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.57.1
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.99.0
 	github.com/caddyserver/certmagic v0.25.3
-	github.com/letsencrypt/boulder v0.20260420.0
+	github.com/letsencrypt/boulder v0.20260428.0
 	github.com/libdns/route53 v1.6.2
 	github.com/mholt/acmez/v3 v3.1.6
 	github.com/stretchr/testify v1.11.1
diff --git a/go.sum b/go.sum
index 7d9375f..69290b2 100644
--- a/go.sum
+++ b/go.sum
@@ -100,8 +100,8 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
-github.com/letsencrypt/boulder v0.20260420.0 h1:PMFy37+tQAfNe2Qks7NhTrKbULzhVmj19LbaZIaz0SE=
-github.com/letsencrypt/boulder v0.20260420.0/go.mod h1:ZisB912eU757QUU0PTH+zq2JScaegVjPVKtPn2K1U3w=
+github.com/letsencrypt/boulder v0.20260428.0 h1:q1GQNWKn2A2O4eZ8HFHAcNp6AyoGGrNXgU3uM4qFVRU=
+github.com/letsencrypt/boulder v0.20260428.0/go.mod h1:Ci7TOlM216Ht8nJLJUS8jKNX3KuDNo1O/nni1iFTWyc=
 github.com/letsencrypt/challtestsrv v1.4.2 h1:0ON3ldMhZyWlfVNYYpFuWRTmZNnyfiL9Hh5YzC3JVwU=
 github.com/letsencrypt/challtestsrv v1.4.2/go.mod h1:GhqMqcSoeGpYd5zX5TgwA6er/1MbWzx/o7yuuVya+Wk=
 github.com/letsencrypt/pebble/v2 v2.10.0 h1:Wq6gYXlsY6ubqI3hhxsTzdyotvfdjFBxuwYqCLCnj/U=