diff --git a/appveyor.yml b/appveyor.yml
index 98b9cd9f..aa817368 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,25 +13,23 @@ branches:
     - master
 
 environment:
-  GOPATH: C:\gopath
-  GOROOT: C:\go121
+  GOROOT: C:\go122
   GOPY_APPVEYOR_CI: '1'
   GOTRACEBACK: 'crash'
   CPYTHON3DIR: "C:\\Python311-x64"
-  PATH: '%GOPATH%\bin;%GOROOT%\bin;%CPYTHON3DIR%;%CPYTHON3DIR%\\Scripts;C:\msys64\mingw64\bin;C:\msys64\usr\bin\;%PATH%'
-
-stack: go 1.21
+  PATH: 'C:\go122\bin;%USERPROFILE%\go\bin;%CPYTHON3DIR%;%CPYTHON3DIR%\\Scripts;C:\msys64\mingw64\bin;C:\msys64\usr\bin\;%PATH%'
 
 build_script:
   - python --version
-  - "%CPYTHON3DIR%\\python --version"
-  - "%CPYTHON3DIR%\\python -m pip install --upgrade pip"
-  - "%CPYTHON3DIR%\\python -m pip install cffi"
-  - "%CPYTHON3DIR%\\python -m pip install pybindgen"
+  - "python -m pip install --upgrade pip"
+  - "python -m pip install cffi"
+  - "python -m pip install pybindgen"
+  - "where go"
+  - "C:\\go122\\bin\\go.exe version"
   - go version
   - go env
   - go get -v -t ./...
-  - go install golang.org/x/tools/cmd/goimports@latest
+  - go install golang.org/x/tools/cmd/goimports
 
 test_script:
   - go test ./...
diff --git a/bind/gen.go b/bind/gen.go
index 05fd70e9..3685bbab 100644
--- a/bind/gen.go
+++ b/bind/gen.go
@@ -52,7 +52,9 @@ package main
 %[3]s
 // #define Py_LIMITED_API // need full API for PyRun*
 #include <Python.h>
+#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 202311L)
 typedef uint8_t bool;
+#endif
 // static inline is trick for avoiding need for extra .c file
 // the following are used for build value -- switch on reflect.Kind
 // or the types equivalent
@@ -409,8 +411,8 @@ build:
 	# goimports is needed to ensure that the imports list is valid
 	$(GOIMPORTS) -w %[1]s.go
 	# this will otherwise be built during go build and may be out of date
-	- rm %[1]s.c 
-	echo "typedef uint8_t bool;" > %[1]s_go.h
+	- rm %[1]s.c
+	printf "#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 202311L)\ntypedef uint8_t bool;\n#endif\n" > %[1]s_go.h
 	# this will fail but is needed to generate the .c file that then allows go build to work
 	- $(PYTHON) build.py >/dev/null 2>&1
 	# generate %[1]s_go.h from %[1]s.go -- unfortunately no way to build .h only
diff --git a/cmd_build.go b/cmd_build.go
index 6c63dff7..24b0191c 100644
--- a/cmd_build.go
+++ b/cmd_build.go
@@ -125,7 +125,7 @@ func runBuild(mode bind.BuildMode, cfg *BuildCfg) error {
 
 	if mode == bind.ModeExe {
 		of, err := os.Create(buildname + ".h") // overwrite existing
-		fmt.Fprintf(of, "typedef uint8_t bool;\n")
+		fmt.Fprintf(of, "#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 202311L)\ntypedef uint8_t bool;\n#endif\n")
 		of.Close()
 
 		fmt.Printf("%v build.py   # will fail, but needed to generate .c file\n", cfg.VM)
diff --git a/go.mod b/go.mod
index 673ca252..0f31b04d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,12 +1,15 @@
 module github.com/go-python/gopy
 
-go 1.19
+go 1.22.0
 
 require (
 	github.com/gonuts/commander v0.1.0
 	github.com/gonuts/flag v0.1.0
 	github.com/pkg/errors v0.9.1
-	golang.org/x/tools v0.16.0
+	golang.org/x/tools v0.26.0
 )
 
-require golang.org/x/mod v0.14.0 // indirect
+require (
+	golang.org/x/mod v0.21.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+)
diff --git a/go.sum b/go.sum
index fe0b52ca..7f1f86f5 100644
--- a/go.sum
+++ b/go.sum
@@ -4,11 +4,9 @@ github.com/gonuts/flag v0.1.0 h1:fqMv/MZ+oNGu0i9gp0/IQ/ZaPIDoAZBOBaJoV7viCWM=
 github.com/gonuts/flag v0.1.0/go.mod h1:ZTmTGtrSPejTo/SRNhCqwLTmiAgyBdCkLYhHrAoBdz4=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
-golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/tools v0.16.0 h1:GO788SKMRunPIBCXiQyo2AaexLstOrVhuAL5YwsckQM=
-golang.org/x/tools v0.16.0/go.mod h1:kYVVN6I1mBNoB1OX+noeBjbRk4IUEPa7JJ+TJMEooJ0=
+golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
+golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
+golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
+golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=