diff --git a/configure b/configure
index 192dc9ed1..685aa7cff 100755
--- a/configure
+++ b/configure
@@ -5188,12 +5188,12 @@ if test -n "$zlib_CFLAGS"; then
     pkg_cv_zlib_CFLAGS="$zlib_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.5.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.5.2") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_zlib_CFLAGS=`$PKG_CONFIG --cflags "zlib" 2>/dev/null`
+  pkg_cv_zlib_CFLAGS=`$PKG_CONFIG --cflags "zlib >= 1.2.5.2" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -5205,12 +5205,12 @@ if test -n "$zlib_LIBS"; then
     pkg_cv_zlib_LIBS="$zlib_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib") 2>&5
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.5.2\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.5.2") 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_zlib_LIBS=`$PKG_CONFIG --libs "zlib" 2>/dev/null`
+  pkg_cv_zlib_LIBS=`$PKG_CONFIG --libs "zlib >= 1.2.5.2" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -5231,14 +5231,14 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        zlib_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib" 2>&1`
+	        zlib_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib >= 1.2.5.2" 2>&1`
         else
-	        zlib_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib" 2>&1`
+	        zlib_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib >= 1.2.5.2" 2>&1`
         fi
 	# Put the nasty error message in config.log where it belongs
 	echo "$zlib_PKG_ERRORS" >&5
 
-	as_fn_error $? "Package requirements (zlib) were not met:
+	as_fn_error $? "Package requirements (zlib >= 1.2.5.2) were not met:
 
 $zlib_PKG_ERRORS
 
diff --git a/configure.ac b/configure.ac
index cc1347241..342d9550f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -166,7 +166,7 @@ PKG_CHECK_MODULES(libtorrent,
                   LIBS="$libtorrent_LIBS $LIBS"])
 
 PKG_CHECK_MODULES(zlib,
-                 [zlib],
+                 [zlib >= 1.2.5.2],
                  [CPPFLAGS="$zlib_CFLAGS $CPPFLAGS"
                  LIBS="$zlib_LIBS $LIBS"])
 
diff --git a/src/base/CMakeLists.txt b/src/base/CMakeLists.txt
index a9eb2f5c8..1f30f5479 100644
--- a/src/base/CMakeLists.txt
+++ b/src/base/CMakeLists.txt
@@ -1,4 +1,4 @@
-find_package(ZLIB REQUIRED)
+find_package(ZLIB 1.2.5.2 REQUIRED)
 
 set(QBT_BASE_HEADERS
 bittorrent/cachestatus.h