diff --git a/configure.ac b/configure.ac
index 37889dd5..6133344e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.63])
-AC_INIT([leech], [0.1.19], [https://github.com/larsewi/leech/issues], [leech],
+AC_INIT([leech], [0.1.20], [https://github.com/larsewi/leech/issues], [leech],
         [https://github.com/larsewi/leech])
 AC_CONFIG_SRCDIR([lib/leech.h])
 
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 77487fc4..30f1d6d5 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1,4 +1,7 @@
-AM_CFLAGS = -Wall -Wextra -Werror -Wconversion -Wformat
+AM_CFLAGS = -Wall -Wextra -Wconversion -Wformat
+if !NDEBUG
+AM_CFLAGS += -Werror
+endif
 AM_CPPFLAGS = -include config.h
 
 include_HEADERS = $(top_builddir)/lib/leech.h