diff --git a/internal/gengapic/generator.go b/internal/gengapic/generator.go
index fa8961ab..731bd7b9 100644
--- a/internal/gengapic/generator.go
+++ b/internal/gengapic/generator.go
@@ -36,23 +36,6 @@ import (
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-var enableNewAuthLibraryBlocklist = map[string]bool{
-	"generativelanguage.googleapis.com":  true,
-	"aiplatform.googleapis.com":          true,
-	"analyticshub.googleapis.com":        true,
-	"biglake.googleapis.com":             true,
-	"bigtableadmin.googleapis.com":       true,
-	"bigtable.googleapis.com":            true,
-	"datastore.googleapis.com":           true,
-	"clouderrorreporting.googleapis.com": true,
-	"firestore.googleapis.com":           true,
-	"logging.googleapis.com":             true,
-	"cloudprofiler.googleapis.com":       true,
-	"pubsub.googleapis.com":              true,
-	"pubsublite.googleapis.com":          true,
-	"spanner.googleapis.com":             true,
-}
-
 // keyed by proto package name, e.g. "google.cloud.foo.v1".
 var enableWrapperTypesForPageSize = map[string]bool{
 	"google.cloud.bigquery.v2": true,
diff --git a/internal/gengapic/gengrpc.go b/internal/gengapic/gengrpc.go
index 909b2edf..1751f13c 100644
--- a/internal/gengapic/gengrpc.go
+++ b/internal/gengapic/gengrpc.go
@@ -185,9 +185,7 @@ func (g *generator) grpcClientOptions(serv *descriptorpb.ServiceDescriptorProto,
 	p("    internaloption.WithDefaultAudience(%q),", generateDefaultAudience(host))
 	p("    internaloption.WithDefaultScopes(DefaultAuthScopes()...),")
 	p("    internaloption.EnableJwtWithScope(),")
-	if _, ok := enableNewAuthLibraryBlocklist[g.serviceConfig.GetName()]; !ok {
-		p("internaloption.EnableNewAuthLibrary(),")
-	}
+	p("    internaloption.EnableNewAuthLibrary(),")
 	p("    option.WithGRPCDialOption(grpc.WithDefaultCallOptions(")
 	p("      grpc.MaxCallRecvMsgSize(math.MaxInt32))),")
 	p("  }")
diff --git a/internal/gengapic/genrest.go b/internal/gengapic/genrest.go
index a40bc57e..b9bf409b 100644
--- a/internal/gengapic/genrest.go
+++ b/internal/gengapic/genrest.go
@@ -137,9 +137,7 @@ func (g *generator) restClientOptions(serv *descriptorpb.ServiceDescriptorProto,
 	p("    internaloption.WithDefaultUniverseDomain(%q),", googleDefaultUniverse)
 	p("    internaloption.WithDefaultAudience(%q),", generateDefaultAudience(host))
 	p("    internaloption.WithDefaultScopes(DefaultAuthScopes()...),")
-	if _, ok := enableNewAuthLibraryBlocklist[g.serviceConfig.GetName()]; !ok {
-		p("internaloption.EnableNewAuthLibrary(),")
-	}
+	p("    internaloption.EnableNewAuthLibrary(),")
 	p("  }")
 	p("}")
 }