diff --git a/.github/workflows/safer-golangci-lint.yml b/.github/workflows/safer-golangci-lint.yml
index dd7ac15..68c2759 100644
--- a/.github/workflows/safer-golangci-lint.yml
+++ b/.github/workflows/safer-golangci-lint.yml
@@ -1,4 +1,4 @@
-# Copyright © 2021 Montgomery Edwards⁴⁴⁸ (github.com/x448).
+# Copyright © 2021-2023 Montgomery Edwards⁴⁴⁸ (github.com/x448).
 # This file is licensed under MIT License.
 #
 # Safer GitHub Actions Workflow for golangci-lint.
@@ -27,11 +27,13 @@
 #   1. GOLINTERS_VERSION
 #   2. GOLINTERS_TGZ_DGST
 #
-# Release v1.51.2 (February 19, 2023)
-#   - Bump golangci-lint to 1.51.2
-#   - Hash of golangci-lint-1.51.2-linux-amd64.tar.gz
-#     - SHA-256: 4de479eb9d9bc29da51aec1834e7c255b333723d38dbd56781c68e5dddc6a90b
-#                This SHA-256 digest matches golangci-lint-1.51.2-checksums.txt at
+# Release v1.52.2 (May 14, 2023)
+#   - Bump Go to 1.20
+#   - Bump actions/setup-go to v4
+#   - Bump golangci-lint to 1.52.2
+#   - Hash of golangci-lint-1.52.2-linux-amd64.tar.gz
+#     - SHA-256: c9cf72d12058a131746edd409ed94ccd578fbd178899d1ed41ceae3ce5f54501
+#                This SHA-256 digest matches golangci-lint-1.52.2-checksums.txt at
 #                https://github.com/golangci/golangci-lint/releases
 #
 name: linters
@@ -42,15 +44,14 @@ permissions: {}
 on:
   workflow_dispatch:
   pull_request:
-    types: [opened, synchronize, closed]
   push:
     branches: [main, master]
 
 env:
-  GO_VERSION: 1.19
-  GOLINTERS_VERSION: 1.51.2
+  GO_VERSION: 1.20
+  GOLINTERS_VERSION: 1.52.2
   GOLINTERS_ARCH: linux-amd64
-  GOLINTERS_TGZ_DGST: 4de479eb9d9bc29da51aec1834e7c255b333723d38dbd56781c68e5dddc6a90b
+  GOLINTERS_TGZ_DGST: c9cf72d12058a131746edd409ed94ccd578fbd178899d1ed41ceae3ce5f54501
   GOLINTERS_TIMEOUT: 15m
   OPENSSL_DGST_CMD: openssl dgst -sha256 -r
   CURL_CMD: curl --proto =https --tlsv1.2 --location --silent --show-error --fail
@@ -68,7 +69,7 @@ jobs:
           fetch-depth: 1
 
       - name: Setup Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ env.GO_VERSION }}
           check-latest: true