diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 67182c6..2d53459 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
     - name: Setup Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.22
+        go-version: 1.23
     - name: Fetch dependencies
       run: |
         cd gopath/github.com/katydid/validator-go
@@ -28,6 +28,7 @@ jobs:
         cd gopath/github.com/katydid/validator-go
         go install -x github.com/goccmack/gocc
         go install -x github.com/awalterschulze/goderive
+        go install -x github.com/awalterschulze/checklicense
     - name: env
       run: env && go env && pwd
     - name: tree
diff --git a/go.mod b/go.mod
index 6a6a848..aa830c8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,10 @@
 module github.com/katydid/validator-go
 
-go 1.22
+go 1.23
 
 require (
 	github.com/awalterschulze/goderive v0.0.0-20240621165703-0a721d5b1d72
 	github.com/goccmack/gocc v0.0.0-20230228185258-2292f9e40198
-	github.com/katydid/checklicense v0.0.0-20160404130115-fde9b404b192
 )
 
 require (
diff --git a/go.sum b/go.sum
index 8a2ee51..e434ab2 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,6 @@ github.com/awalterschulze/goderive v0.0.0-20240621165703-0a721d5b1d72 h1:G6rewDn
 github.com/awalterschulze/goderive v0.0.0-20240621165703-0a721d5b1d72/go.mod h1:rXccmDQDJN/4aGqWxWhq+UmBJeQEkFV/2/rkluP+ipA=
 github.com/goccmack/gocc v0.0.0-20230228185258-2292f9e40198 h1:FSii2UQeSLngl3jFoR4tUKZLprO7qUlh/TKKticc0BM=
 github.com/goccmack/gocc v0.0.0-20230228185258-2292f9e40198/go.mod h1:DTh/Y2+NbnOVVoypCCQrovMPDKUGp4yZpSbWg5D0XIM=
-github.com/katydid/checklicense v0.0.0-20160404130115-fde9b404b192 h1:to6Z5a2KsdLrbtSF6A0x+XsVglZBy3/7JrjCcwuKQdY=
-github.com/katydid/checklicense v0.0.0-20160404130115-fde9b404b192/go.mod h1:4jBNOR9RCOsFJ5goipiJ4bxzXA0xghxRD79Dy08cXpQ=
 github.com/kisielk/gotool v1.0.0 h1:AV2c/EiW3KqPNT9ZKl07ehoAGi4C5/01Cfbblndcapg=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=