diff --git a/build-scripts/gnu-linux-arm-rbpi-config/aria2-arm-rbpi-gnu-linux-cross-build-libs b/build-scripts/gnu-linux-arm-rbpi-config/aria2-arm-rbpi-gnu-linux-cross-build-libs
index f46acf7..33ff4d3 100755
--- a/build-scripts/gnu-linux-arm-rbpi-config/aria2-arm-rbpi-gnu-linux-cross-build-libs
+++ b/build-scripts/gnu-linux-arm-rbpi-config/aria2-arm-rbpi-gnu-linux-cross-build-libs
@@ -18,7 +18,7 @@
  fi
 
 ## DEPENDENCES ##
-ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz
+ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.11/zlib-1.2.11.tar.gz
 OPENSSL=http://www.openssl.org/source/openssl-1.0.2j.tar.gz
 EXPAT=https://sourceforge.net/projects/expat/files/expat/2.2.0/expat-2.2.0.tar.bz2
 SQLITE3=http://www.sqlite.org/2017/sqlite-autoconf-3160200.tar.gz
@@ -50,8 +50,8 @@ cd $BUILD_DIRECTORY
 #
  # zlib build
   $DOWNLOADER $ZLIB
-  tar zxvf zlib-1.2.8.tar.gz
-  cd zlib-1.2.8/
+  tar zxvf zlib-1.2.11.tar.gz
+  cd zlib-1.2.11/
   PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/ LD_LIBRARY_PATH=$PREFIX/lib/ CC=$HOST-gcc STRIP=$HOST-strip RANLIB=$HOST-ranlib CXX=$HOST-g++ AR=$HOST-ar LD=$HOST-ld ./configure --prefix=$PREFIX --static
   make
   make install
diff --git a/build-scripts/gnu-linux-config/aria2-i386-gnu-linux-cross-build-libs b/build-scripts/gnu-linux-config/aria2-i386-gnu-linux-cross-build-libs
index 2d58dc7..4fce0cd 100755
--- a/build-scripts/gnu-linux-config/aria2-i386-gnu-linux-cross-build-libs
+++ b/build-scripts/gnu-linux-config/aria2-i386-gnu-linux-cross-build-libs
@@ -25,7 +25,7 @@ CXX_COMPILER="g++"
  fi
 
 ## DEPENDENCES ##
-ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz
+ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.11/zlib-1.2.11.tar.gz
 OPENSSL=http://www.openssl.org/source/openssl-1.0.2j.tar.gz
 EXPAT=https://sourceforge.net/projects/expat/files/expat/2.2.0/expat-2.2.0.tar.bz2
 SQLITE3=http://www.sqlite.org/2017/sqlite-autoconf-3160200.tar.gz
@@ -43,8 +43,8 @@ export LDFLAGS="-m32"
 #
  # zlib build
   $DOWNLOADER $ZLIB
-  tar zxvf zlib-1.2.8.tar.gz
-  cd zlib-1.2.8/
+  tar zxvf zlib-1.2.11.tar.gz
+  cd zlib-1.2.11/
   CFLAGS="-m32" CXXFLAGS="-m32" LDFLAGS="-m32" PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/ LD_LIBRARY_PATH=$PREFIX/lib/ CC="$C_COMPILER -m32" CXX="$CXX_COMPILER -m32" ./configure --prefix=$PREFIX --static
   make
   make install
diff --git a/build-scripts/gnu-linux-config/aria2-x86_64-gnu-linux-build-libs b/build-scripts/gnu-linux-config/aria2-x86_64-gnu-linux-build-libs
index b6c5c9b..faed7cf 100755
--- a/build-scripts/gnu-linux-config/aria2-x86_64-gnu-linux-build-libs
+++ b/build-scripts/gnu-linux-config/aria2-x86_64-gnu-linux-build-libs
@@ -23,7 +23,7 @@ CXX_COMPILER="g++"
  fi
 
 ## DEPENDENCES ##
-ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz
+ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.11/zlib-1.2.11.tar.gz
 OPENSSL=http://www.openssl.org/source/openssl-1.0.2j.tar.gz
 EXPAT=https://sourceforge.net/projects/expat/files/expat/2.2.0/expat-2.2.0.tar.bz2
 SQLITE3=http://www.sqlite.org/2017/sqlite-autoconf-3160200.tar.gz
@@ -38,8 +38,8 @@ cd $BUILD_DIRECTORY
 #
  # zlib build
   $DOWNLOADER $ZLIB
-  tar zxvf zlib-1.2.8.tar.gz
-  cd zlib-1.2.8/
+  tar zxvf zlib-1.2.11.tar.gz
+  cd zlib-1.2.11/
   PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/ LD_LIBRARY_PATH=$PREFIX/lib/ CC="$C_COMPILER" CXX="$CXX_COMPILER" ./configure --prefix=$PREFIX --static
   make
   make install
diff --git a/build-scripts/mingw-config/aria2-i686-w64-mingw-build-libs b/build-scripts/mingw-config/aria2-i686-w64-mingw-build-libs
index 5143b4b..918f7d1 100755
--- a/build-scripts/mingw-config/aria2-i686-w64-mingw-build-libs
+++ b/build-scripts/mingw-config/aria2-i686-w64-mingw-build-libs
@@ -20,7 +20,7 @@
  fi
 
 ## DEPENDENCES ##
-ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz
+ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.11/zlib-1.2.11.tar.gz
 OPENSSL=http://www.openssl.org/source/openssl-1.0.2j.tar.gz
 EXPAT=https://sourceforge.net/projects/expat/files/expat/2.2.0/expat-2.2.0.tar.bz2
 SQLITE3=http://www.sqlite.org/2017/sqlite-autoconf-3160200.tar.gz
@@ -37,8 +37,8 @@ cd $BUILD_DIRECTORY
 #
  # zlib build
   $DOWNLOADER $ZLIB
-  tar zxvf zlib-1.2.8.tar.gz
-  cd zlib-1.2.8/
+  tar zxvf zlib-1.2.11.tar.gz
+  cd zlib-1.2.11/
   CC=$HOST-gcc CXX=$HOST-g++ AR=$HOST-ar RANLIB=$HOST-ranlib ./configure --prefix=$PREFIX --static
   make
   make install
diff --git a/build-scripts/mingw-config/aria2-x86_64-w64-mingw-build-libs b/build-scripts/mingw-config/aria2-x86_64-w64-mingw-build-libs
index a0958f6..c26c5a4 100755
--- a/build-scripts/mingw-config/aria2-x86_64-w64-mingw-build-libs
+++ b/build-scripts/mingw-config/aria2-x86_64-w64-mingw-build-libs
@@ -20,7 +20,7 @@
  fi
 
 ## DEPENDENCES ##
-ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.8/zlib-1.2.8.tar.gz
+ZLIB=http://sourceforge.net/projects/libpng/files/zlib/1.2.11/zlib-1.2.11.tar.gz
 OPENSSL=http://www.openssl.org/source/openssl-1.0.2j.tar.gz
 EXPAT=https://sourceforge.net/projects/expat/files/expat/2.2.0/expat-2.2.0.tar.bz2
 SQLITE3=http://www.sqlite.org/2017/sqlite-autoconf-3160200.tar.gz
@@ -37,8 +37,8 @@ cd $BUILD_DIRECTORY
 #
  # zlib build
   $DOWNLOADER $ZLIB
-  tar zxvf zlib-1.2.8.tar.gz
-  cd zlib-1.2.8/
+  tar zxvf zlib-1.2.11.tar.gz
+  cd zlib-1.2.11/
   CC=$HOST-gcc CXX=$HOST-g++ AR=$HOST-ar RANLIB=$HOST-ranlib ./configure --prefix=$PREFIX --static
   make
   make install