diff --git a/lib/pdk/cli/exec.rb b/lib/pdk/cli/exec.rb
index <HASH>..<HASH> 100644
--- a/lib/pdk/cli/exec.rb
+++ b/lib/pdk/cli/exec.rb
@@ -1,4 +1,5 @@
 require 'childprocess'
+require 'tempfile'
 
 module PDK
   module CLI
(MAINT) Fixup usage of Tempfile in PDK::CLI::Exec