diff --git a/Dockerfile b/Dockerfile
index cbff476..dc1cce8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,6 +19,8 @@ FROM golang:1.24 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG GCFLAGS
+ARG GOPROXY
+ENV GOPROXY=$GOPROXY
 
 WORKDIR /workspace
 # Copy the Go Modules manifests
diff --git a/Makefile b/Makefile
index ce772a1..5eb6f73 100644
--- a/Makefile
+++ b/Makefile
@@ -84,6 +84,7 @@ TARGETARCH ?= $(shell go env GOARCH)
 GO_BUILD_OPTS ?= CGO_ENABLED=0 GOOS=$(TARGETOS) GOARCH=$(TARGETARCH)
 GO_LDFLAGS ?= $(VERSION_LDFLAGS)
 GO_GCFLAGS ?=
+GOPROXY ?=
 
 # PKGs to test
 PKGS = $$(go list ./... | grep -v /e2e | grep -v ".*/mocks")
@@ -172,7 +173,7 @@ build:  $(BUILDDIR) ## Build manager binary.
 # More info: https://docs.docker.com/develop/develop-images/build_enhancements/
 .PHONY: docker-build
 docker-build: ## Build docker image with the manager.
-	$(CONTAINER_TOOL) build -t ${IMG} .
+	$(CONTAINER_TOOL) build -t ${IMG} --build-arg GOPROXY="$(GOPROXY)" .
 
 .PHONY: docker-push
 docker-push: ## Push docker image with the manager.