diff --git a/.travis.yml b/.travis.yml
index 10b70d5..3e1199f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,11 +16,11 @@ matrix:
       env: BINDINGS=python CC=clang
     - compiler: gcc
       language: perl
-      perl: 5.14
+      perl: 5.18
       env: BINDINGS=perl
     - compiler: clang
       language: perl
-      perl: 5.14
+      perl: 5.18
       env: BINDINGS=perl CC=clang
 before_install:
   - sudo apt-get update -qq
diff --git a/src/bindings/perl/hammer.i b/src/bindings/perl/hammer.i
index eaf504d..6e3a133 100644
--- a/src/bindings/perl/hammer.i
+++ b/src/bindings/perl/hammer.i
@@ -1,7 +1,6 @@
 %module hammer;
 %begin %{
 #include <unistd.h>
-#include <stdbool.h>
 #include <stdint.h>
 %}