diff --git a/conanfile.txt b/conanfile.txt
index 32c589b..5c5c19e 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,4 +1,5 @@
 [requires]
+zlib/1.2.12
 libpng/1.6.37
 glew/2.2.0