diff --git a/root/DEBIAN/postinst b/root/DEBIAN/postinst
index c3b642e..f976181 100755
--- a/root/DEBIAN/postinst
+++ b/root/DEBIAN/postinst
@@ -26,6 +26,9 @@ pip install requests==2.7.0 evdev==0.5.0
 # pip can't resolve dependencies correctly, see https://github.com/pypa/pip/issues/988
 pip install pyasn1==0.1.8
 
+# wiringpi seems to have developed a bug - fixed to an older, working version
+pip install wiringpi==2.32.1
+
 pip install git+https://github.com/tingbot/tbprocessd.git@v0.6.0
 pip install git+https://github.com/tingbot/tingbot-python.git@v1.1.1