diff --git a/conanfile.txt b/conanfile.txt
index c265b132..be71c491 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -7,6 +7,7 @@ fmt/8.1.1
 spdlog/1.9.2
 sdl/2.0.20
 fltk/1.3.8
+zlib/1.2.12
 
 [generators]
 cmake_find_package_multi