diff --git a/src/lib/Makefile b/src/lib/Makefile
index 06513e298..382ca9f21 100644
--- a/src/lib/Makefile
+++ b/src/lib/Makefile
@@ -2,7 +2,7 @@ ERR      = *** Unexpected MAKELEVEL = 0.
 HINT     = This Makefile can't be used directly, consider cd ../.. before try again
 $(if $(subst 0,,${MAKELEVEL}),,$(warning $(ERR));$(error $(HINT)))
 
-V_ZLIB  = 1.2.11
+V_ZLIB  = 1.2.12
 V_SSL   = 3.0.0
 V_CURL  = 7.80.0
 V_SQL   = 3370000