diff --git a/3rdparty/ext_sip/CMakeLists.txt b/3rdparty/ext_sip/CMakeLists.txt
index c7024b870c..5e073aff08 100644
--- a/3rdparty/ext_sip/CMakeLists.txt
+++ b/3rdparty/ext_sip/CMakeLists.txt
@@ -1,45 +1,45 @@
 SET(PREFIX_ext_sip "${EXTPREFIX}" )
 if (UNIX)
   SET(PYTHON_EXECUTABLE_PATH ${PREFIX_ext_sip}/bin/python3)
   if(NOT EXISTS ${PYTHON_EXECUTABLE_PATH})
     message("WARNING: using system python3!")
     SET(PYTHON_EXECUTABLE_PATH python3)
   endif()
 
   ExternalProject_Add( ext_sip
         DOWNLOAD_DIR ${EXTERNALS_DOWNLOAD_DIR}
-        URL https://www.riverbankcomputing.com/static/Downloads/sip/4.19.15/sip-4.19.15.zip
-        URL_MD5 301c9deccffaface52ad425fbdf447ae
+        URL https://www.riverbankcomputing.com/static/Downloads/sip/4.19.15/sip-4.19.15.tar.gz
+        URL_MD5 236578d2199da630ae1251671b9a7bfe
 
         CONFIGURE_COMMAND ${PYTHON_EXECUTABLE_PATH} <SOURCE_DIR>/configure.py -b ${PREFIX_ext_sip}/bin -d ${PREFIX_ext_sip}/sip -e ${PREFIX_ext_sip}/include  --sipdir ${PREFIX_ext_sip}/sip --target-py-version 3.5
         BUILD_COMMAND make
         INSTALL_COMMAND make install
 
         BUILD_IN_SOURCE 1
 
         UPDATE_COMMAND ""
     )
 elseif (MINGW)
     list(APPEND _SIP_conf
         --platform win32-g++
         -b ${PREFIX_ext_sip}/bin
         -d ${PREFIX_ext_sip}/lib/krita-python-libs
         -e ${PREFIX_ext_sip}/include
         --sipdir ${PREFIX_ext_sip}/share/sip
         --target-py-version 3.6
     )
     ExternalProject_Add( ext_sip
         DOWNLOAD_DIR ${EXTERNALS_DOWNLOAD_DIR}
-        URL https://www.riverbankcomputing.com/static/Downloads/sip/sip-4.19.15.tar.gz
-        URL_MD5 236578d2199da630ae1251671b9a7bfe
+        URL https://www.riverbankcomputing.com/static/Downloads/sip/4.19.15/sip-4.19.15.zip
+        URL_MD5 301c9deccffaface52ad425fbdf447ae
 
         CONFIGURE_COMMAND ${PYTHON_EXECUTABLE} <SOURCE_DIR>/configure.py ${_SIP_conf}
         BUILD_COMMAND mingw32-make -j${SUBMAKE_JOBS} LDFLAGS=${SECURITY_SHARED_LINKER_FLAGS}
         INSTALL_COMMAND mingw32-make -j${SUBMAKE_JOBS} install
         
         BUILD_IN_SOURCE 1
 
         UPDATE_COMMAND ""
     )
 endif()