diff --git a/Makefile b/Makefile
index 6bcaea8..ba8621f 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ TARVERSION := $(shell "$(CURDIR)/scripts/get-version.sh" --tar)
 PACKAGENAME := github.com/strukturag/nextcloud-spreed-signaling
 ALL_PACKAGES := $(PACKAGENAME) $(PACKAGENAME)/client $(PACKAGENAME)/proxy $(PACKAGENAME)/server
 
-PROTOC_GEN_GRPC_VERSION := v1.2.0
+PROTOC_GEN_GRPC_VERSION := v1.3.0
 
 ifneq ($(VERSION),)
 INTERNALLDFLAGS := -X main.version=$(VERSION)
@@ -155,6 +155,8 @@ vendor: go.mod go.sum common
 	mkdir -p $(VENDORDIR)/github.com/mailru/easyjson/; \
 	cp -rf --no-preserve=mode $$EASYJSON_DIR/easyjson/ $(VENDORDIR)/github.com/mailru/easyjson/; \
 	mkdir -p $(VENDORDIR)/google.golang.org/grpc/cmd/protoc-gen-go-grpc/; \
+	[ -d "$(GOPATH)/pkg/mod/google.golang.org/grpc/cmd/protoc-gen-go-grpc@$(PROTOC_GEN_GRPC_VERSION)" ] || echo "Folder for protoc-gen-go-grpc command does not exist, please check Makefile."; \
+	[ -d "$(GOPATH)/pkg/mod/google.golang.org/grpc/cmd/protoc-gen-go-grpc@$(PROTOC_GEN_GRPC_VERSION)" ] || exit 1; \
 	cp -rf --no-preserve=mode $(GOPATH)/pkg/mod/google.golang.org/grpc/cmd/protoc-gen-go-grpc@$(PROTOC_GEN_GRPC_VERSION)/* $(VENDORDIR)/google.golang.org/grpc/cmd/protoc-gen-go-grpc/; \
 	cp -rf --no-preserve=mode $$PROTOBUF_DIR/cmd/ $(VENDORDIR)/google.golang.org/protobuf/; \