diff --git a/vulncheck/binary.go b/vulncheck/binary.go
index b805c8a..cf04bee 100644
--- a/vulncheck/binary.go
+++ b/vulncheck/binary.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.18
+// +build go1.18
+
 package vulncheck
 
 import (
diff --git a/vulncheck/binary_test.go b/vulncheck/binary_test.go
index 63c090f..e7eb502 100644
--- a/vulncheck/binary_test.go
+++ b/vulncheck/binary_test.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.18
+// +build go1.18
+
 package vulncheck
 
 import (
diff --git a/vulncheck/internal/binscan/exe.go b/vulncheck/internal/binscan/exe.go
index 37399e1..fc2f862 100644
--- a/vulncheck/internal/binscan/exe.go
+++ b/vulncheck/internal/binscan/exe.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.18
+// +build go1.18
+
 package binscan
 
 // This file is a somewhat modified version of cmd/go/internal/version/exe.go
diff --git a/vulncheck/internal/binscan/scan.go b/vulncheck/internal/binscan/scan.go
index 35d0fcd..ec8a5ea 100644
--- a/vulncheck/internal/binscan/scan.go
+++ b/vulncheck/internal/binscan/scan.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.18
+// +build go1.18
+
 // Package binscan contains methods for parsing Go binary files for the purpose
 // of extracting module dependency and symbol table information.
 package binscan