diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 6efba441..ceb0a7b6 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   bin:
     name: Build binary and run unit tests
-    runs-on: [ubuntu-18.04]
+    runs-on: [ubuntu-latest]
     steps:
       - name: Set up Go 1.16
         uses: actions/setup-go@v1
@@ -20,3 +20,16 @@ jobs:
         run: make bin
       - name: Run tests
         run: make test
+
+  check-tidy:
+    name: Check tidy
+    runs-on: [ubuntu-latest]
+    steps:
+      - name: Set up Go 1.16
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.16
+      - name: Check-out code
+        uses: actions/checkout@v2
+      - name: Check tidy
+        run: make test-tidy
diff --git a/Makefile b/Makefile
index 2fcae49e..194cd3ed 100644
--- a/Makefile
+++ b/Makefile
@@ -158,5 +158,15 @@ packagemanifests: kustomize manifests
 	cd config/manager && $(KUSTOMIZE) edit set image antrea-operator=$(IMG)
 	$(KUSTOMIZE) build config/manifests | operator-sdk generate packagemanifests -q --version $(VERSION) $(PKG_MAN_OPTS)
 
+test-tidy:
+	@echo
+	@echo "===> Checking go.mod tidiness <==="
+	./hack/tidy-check.sh
+
+.PHONY: tidy
+tidy:
+	rm -f go.sum
+	go mod tidy
+
 .PHONY: bin
 bin: manager
diff --git a/hack/tidy-check.sh b/hack/tidy-check.sh
new file mode 100755
index 00000000..fad6b77a
--- /dev/null
+++ b/hack/tidy-check.sh
@@ -0,0 +1,118 @@
+#!/bin/bash
+
+# Copyright 2019 Antrea Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set +e
+trap cleanup EXIT
+
+THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+
+pushd "$(dirname "$THIS_DIR")" >/dev/null || exit
+
+PROJECT_RELATIVE_DIR=${1:-.}
+PROJECT_DIR=$(dirname "$THIS_DIR")/$PROJECT_RELATIVE_DIR
+
+MOD_FILE="$PROJECT_DIR/go.mod"
+SUM_FILE="$PROJECT_DIR/go.sum"
+TMP_DIR="$THIS_DIR/.tmp.tidy-check"
+TMP_MOD_FILE="$TMP_DIR/go.mod"
+TMP_SUM_FILE="$TMP_DIR/go.sum"
+
+# if Go environment variable is set, use it as it is, otherwise default to "go"
+: "${GO:=go}"
+: "${TARGET_GO_VERSION:=1.16}"
+
+TIDY_COMMAND="cd $PROJECT_RELATIVE_DIR && $GO mod tidy >> /dev/null 2>&1"
+
+function echoerr {
+    echo >&2 "$@"
+}
+
+function general_help {
+    echoerr "Please run the following command to generate a new go.mod & go.sum:"
+    echoerr "  \$ make tidy"
+}
+
+function precheck {
+    if [ ! -r "$MOD_FILE" ]; then
+        echoerr "no go.mod found"
+        general_help
+        exit 1
+    fi
+    if [ ! -r "$SUM_FILE" ]; then
+        echoerr "no go.sum found"
+        general_help
+        exit 1
+    fi
+    mkdir -p "$TMP_DIR"
+}
+
+function tidy {
+    cp "$MOD_FILE" "$TMP_MOD_FILE"
+    mv "$SUM_FILE" "$TMP_SUM_FILE"
+
+    if [ -n "$GO" ]; then
+        /bin/bash -c "$TIDY_COMMAND"
+    else
+        docker run --rm -u "$(id -u):$(id -g)" \
+            -e "GOCACHE=/tmp/gocache" \
+            -e "GOPATH=/tmp/gopath" \
+            -w /usr/src/vmware/antrea-operator-for-kubernetes \
+            -v "$(dirname "$THIS_DIR"):/usr/src/vmware/antrea-operator-for-kubernetes" \
+            golang:$TARGET_GO_VERSION bash -c "$TIDY_COMMAND"
+    fi
+}
+
+function cleanup {
+    if [ -f "$TMP_MOD_FILE" ]; then
+        mv "$TMP_MOD_FILE" "$MOD_FILE"
+    fi
+    if [ -f "$TMP_SUM_FILE" ]; then
+        mv "$TMP_SUM_FILE" "$SUM_FILE"
+    fi
+    if [ -d "$TMP_DIR" ]; then
+        rm -fr "$TMP_DIR"
+    fi
+}
+
+function failed {
+    echoerr "'go mod tidy' failed, there are errors in dependencies"
+    general_help
+    exit 1
+}
+
+function check {
+    MOD_DIFF=$(diff "$MOD_FILE" "$TMP_MOD_FILE")
+    SUM_DIFF=$(diff "$SUM_FILE" "$TMP_SUM_FILE")
+    if [ -n "$MOD_DIFF" ] || [ -n "$SUM_DIFF" ]; then
+        echo "=== go.mod diff ==="
+        echo $MOD_DIFF
+        echo "=== go.sum diff ==="
+        echo $SUM_DIFF
+
+        echoerr "dependencies are not tidy"
+        general_help
+        exit 1
+    fi
+}
+
+precheck
+if tidy; then
+    check
+else
+    failed
+fi
+
+popd >/dev/null || exit