diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 3a4473902cb..5edd93599e5 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -2250,7 +2250,7 @@
 //
 // The second is the SWIG program, which is a general tool for
 // interfacing between languages. For information on SWIG see
-// http://swig.org/. When running go build, any file with a .swig
+// https://swig.org/. When running go build, any file with a .swig
 // extension will be passed to SWIG. Any file with a .swigcxx extension
 // will be passed to SWIG with the -c++ option.
 //
diff --git a/src/cmd/go/internal/help/helpdoc.go b/src/cmd/go/internal/help/helpdoc.go
index e1240de710b..3db3ed06b2c 100644
--- a/src/cmd/go/internal/help/helpdoc.go
+++ b/src/cmd/go/internal/help/helpdoc.go
@@ -17,7 +17,7 @@ information on how to use it see the cgo documentation (go doc cmd/cgo).
 
 The second is the SWIG program, which is a general tool for
 interfacing between languages. For information on SWIG see
-http://swig.org/. When running go build, any file with a .swig
+https://swig.org/. When running go build, any file with a .swig
 extension will be passed to SWIG. Any file with a .swigcxx extension
 will be passed to SWIG with the -c++ option.