diff --git a/go.mod b/go.mod
index 021122a..de4f496 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.21
 
 require (
 	github.com/dogmatiq/jumble v0.1.0
-	google.golang.org/protobuf v1.33.0
+	google.golang.org/protobuf v1.34.0
 )
 
 require github.com/google/go-cmp v0.5.8 // indirect
diff --git a/go.sum b/go.sum
index 9ab55d4..604e763 100644
--- a/go.sum
+++ b/go.sum
@@ -2,5 +2,5 @@ github.com/dogmatiq/jumble v0.1.0 h1:Cb3ExfxY+AoUP4G9/sOwoOdYX8o+kOLK8+dhXAry+QA
 github.com/dogmatiq/jumble v0.1.0/go.mod h1:FCGV2ImXu8zvThxhd4QLstiEdu74vbIVw9bFJSBcKr4=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
 github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.34.0 h1:Qo/qEd2RZPCf2nKuorzksSknv0d3ERwp1vFG38gSmH4=
+google.golang.org/protobuf v1.34.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=