diff --git a/Makefile b/Makefile
index 760e527..d2dc2a9 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ RM= rm -f
 
 INCLUDES= \
 	-I$(3RD_PARTY)/lua-5.3.1/src \
-	-I$(3RD_PARTY)/zlib-1.2.8 \
+	-I$(3RD_PARTY)/zlib-1.2.11 \
 	-I$(3RD_PARTY)/giflib-5.1.4/lib \
 	-I$(3RD_PARTY)/SDL2-2.0.7/include \
 	-I$(3RD_PARTY)/sdl-gpu/include \
diff --git a/tools/bin2txt/makefile b/tools/bin2txt/makefile
index 65951f9..71312c2 100644
--- a/tools/bin2txt/makefile
+++ b/tools/bin2txt/makefile
@@ -1,7 +1,7 @@
 OPT=-O3 -Wall -std=c99
 SRC=bin2txt.c
 3RD_PARTY = ../../3rd-party
-INCLUDE=-I$(3RD_PARTY)/zlib-1.2.8
+INCLUDE=-I$(3RD_PARTY)/zlib-1.2.11
 PRE_BUILT = $(3RD_PARTY)/pre-built
 LIB=-lz