diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index de71b24c..1004f123 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -31,6 +31,8 @@ on:
   schedule:
     - cron: '0 0 * * *'
 
+  workflow_dispatch:
+
 concurrency:
 
   group: ${{ github.head_ref || github.run_id }}-${{ github.workflow }}
@@ -41,7 +43,7 @@ jobs:
   addlicense:
     name: verify licenses
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
@@ -61,7 +63,7 @@ jobs:
   buildifier:
     name: check format with buildifier
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
@@ -99,7 +101,7 @@ jobs:
   clang_format:
     name: check format with clang-format
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
@@ -115,7 +117,7 @@ jobs:
   clang_tidy:
     name: check format with clang-tidy
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 811c6a36..5a6dd8f4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,6 +31,8 @@ on:
   schedule:
     - cron: '0 0 * * *'
 
+  workflow_dispatch:
+
 concurrency:
 
   group: ${{ github.head_ref || github.run_id }}-${{ github.workflow }}
@@ -127,7 +129,7 @@ jobs:
           flags: --config=clang-tsan
         - name: 'NullVM on Windows/x86_64'
           engine: 'null'
-          os: windows-2019
+          os: windows-2022
           arch: x86_64
           action: test
           targets: -//test/fuzz/...
diff --git a/include/proxy-wasm/signature_util.h b/include/proxy-wasm/signature_util.h
index 68579dcd..a5c9c39d 100644
--- a/include/proxy-wasm/signature_util.h
+++ b/include/proxy-wasm/signature_util.h
@@ -14,6 +14,7 @@
 
 #pragma once
 
+#include <string>
 #include <string_view>
 
 namespace proxy_wasm {