diff --git a/go.mod b/go.mod
index 451465020..18534de21 100644
--- a/go.mod
+++ b/go.mod
@@ -116,7 +116,7 @@ require (
 	github.com/xdg-go/stringprep v1.0.2 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
 	go.etcd.io/etcd/client/v3 v3.5.4
-	go.mongodb.org/mongo-driver v1.9.0
+	go.mongodb.org/mongo-driver v1.9.1
 	go.opencensus.io v0.23.0 // indirect
 	gocloud.dev v0.25.0
 	gocloud.dev/pubsub/natspubsub v0.25.0
diff --git a/go.sum b/go.sum
index 895dcbbb9..d49f58ead 100644
--- a/go.sum
+++ b/go.sum
@@ -888,8 +888,8 @@ go.etcd.io/etcd/client/pkg/v3 v3.5.4 h1:lrneYvz923dvC14R54XcA7FXoZ3mlGZAgmwhfm7H
 go.etcd.io/etcd/client/pkg/v3 v3.5.4/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
 go.etcd.io/etcd/client/v3 v3.5.4 h1:p83BUL3tAYS0OT/r0qglgc3M1JjhM0diV8DSWAhVXv4=
 go.etcd.io/etcd/client/v3 v3.5.4/go.mod h1:ZaRkVgBZC+L+dLCjTcF1hRXpgZXQPOvnA/Ak/gq3kiY=
-go.mongodb.org/mongo-driver v1.9.0 h1:f3aLGJvQmBl8d9S40IL+jEyBC6hfLPbJjv9t5hEM9ck=
-go.mongodb.org/mongo-driver v1.9.0/go.mod h1:0sQWfOeY63QTntERDJJ/0SuKK0T1uVSgKCuAROlKEPY=
+go.mongodb.org/mongo-driver v1.9.1 h1:m078y9v7sBItkt1aaoe2YlvWEXcD263e1a4E1fBrJ1c=
+go.mongodb.org/mongo-driver v1.9.1/go.mod h1:0sQWfOeY63QTntERDJJ/0SuKK0T1uVSgKCuAROlKEPY=
 go.opencensus.io v0.15.0/go.mod h1:UffZAU+4sDEINUGP/B7UfBBkq4fqLu9zXAX7ke6CHW0=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=