diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f8976d93..55996bdf 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -168,7 +168,7 @@ jobs:
           VERSION=${TAG_NAME#v}
           REPO="${{ github.repository }}"
           DOCKER_IMAGE="${{ secrets.DOCKERHUB_USERNAME }}/sub2api"
-          GHCR_IMAGE="ghcr.io/${REPO}"
+          GHCR_IMAGE="ghcr.io/${REPO,,}"  # ${,,} converts to lowercase
 
           # 获取 tag message 内容
           TAG_MESSAGE='${{ steps.tag_message.outputs.message }}'
diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index 95b66f8f..5b855724 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -78,12 +78,12 @@ dockers:
       - "--label=org.opencontainers.image.version={{ .Version }}"
       - "--label=org.opencontainers.image.revision={{ .Commit }}"
 
-  # GHCR images
+  # GHCR images (owner must be lowercase)
   - id: ghcr-amd64
     goos: linux
     goarch: amd64
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
     dockerfile: Dockerfile.goreleaser
     use: buildx
     build_flag_templates:
@@ -96,7 +96,7 @@ dockers:
     goos: linux
     goarch: arm64
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
     dockerfile: Dockerfile.goreleaser
     use: buildx
     build_flag_templates:
@@ -127,26 +127,26 @@ docker_manifests:
       - "{{ .Env.DOCKERHUB_USERNAME }}/sub2api:{{ .Version }}-amd64"
       - "{{ .Env.DOCKERHUB_USERNAME }}/sub2api:{{ .Version }}-arm64"
 
-  # GHCR manifests
-  - name_template: "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}"
+  # GHCR manifests (owner must be lowercase)
+  - name_template: "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}"
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
 
-  - name_template: "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:latest"
+  - name_template: "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:latest"
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
 
-  - name_template: "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Major }}.{{ .Minor }}"
+  - name_template: "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Major }}.{{ .Minor }}"
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
 
-  - name_template: "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Major }}"
+  - name_template: "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Major }}"
     image_templates:
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
-      - "ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-amd64"
+      - "ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}-arm64"
 
 release:
   github:
@@ -173,7 +173,7 @@ release:
     docker pull {{ .Env.DOCKERHUB_USERNAME }}/sub2api:{{ .Version }}
 
     # GitHub Container Registry
-    docker pull ghcr.io/{{ .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}
+    docker pull ghcr.io/{{ lower .Env.GITHUB_REPO_OWNER }}/sub2api:{{ .Version }}
     ```
 
     **One-line install (Linux):**