diff --git a/3rdparty/ext_pyqt/CMakeLists.txt b/3rdparty/ext_pyqt/CMakeLists.txt
index 01dbec41b7..4ca22caee6 100644
--- a/3rdparty/ext_pyqt/CMakeLists.txt
+++ b/3rdparty/ext_pyqt/CMakeLists.txt
@@ -1,53 +1,53 @@
 SET(PREFIX_ext_pyqt "${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_pyqt
         DOWNLOAD_DIR ${EXTERNALS_DOWNLOAD_DIR}
-        URL https://files.kde.org/krita/build/dependencies/PyQt5_gpl-5.11.2.tar.gz
-        URL_MD5 78837d77c42a2f177da771df6584ee91
+        URL https://files.kde.org/krita/build/dependencies/PyQt5_gpl-5.9.2.zip
+        URL_MD5 67eacf2f486f77136c9758e03fe6889e
         
         CONFIGURE_COMMAND ${PYTHON_EXECUTABLE_PATH} <SOURCE_DIR>/configure.py --confirm-license --qmake ${PREFIX_ext_pyqt}/bin/qmake --sip ${PREFIX_ext_pyqt}/bin/sip --sip-incdir ${PREFIX_ext_pyqt}/include --sipdir ${PREFIX_ext_pyqt}/share/sip
         BUILD_COMMAND make
         INSTALL_COMMAND make install
         
         BUILD_IN_SOURCE 1
 
         UPDATE_COMMAND ""
     )
 elseif(MINGW)
     list(APPEND _PYQT_conf
         --confirm-license
         --target-py-version 3.6
         --bindir ${PREFIX_ext_pyqt}/bin
         --qt ${PREFIX_ext_pyqt}
         --sip ${PREFIX_ext_pyqt}/bin/sip.exe
         --sip-incdir ${PREFIX_ext_pyqt}/include
         --spec win32-g++
         --verbose
         --sipdir ${PREFIX_ext_pyqt}/share/sip
         --destdir ${PREFIX_ext_pyqt}/lib/krita-python-libs
         --stubsdir ${PREFIX_ext_pyqt}/lib/krita-python-libs/PyQt5
         --no-qml-plugin --no-python-dbus --no-qsci-api --no-tools
         --disable QtSql --disable QtTest --disable QtWinExtras
     )
     ExternalProject_Add( ext_pyqt
         DOWNLOAD_DIR ${EXTERNALS_DOWNLOAD_DIR}
-        URL https://files.kde.org/krita/build/dependencies/PyQt5_gpl-5.11.2.zip
-        URL_MD5 f588cd6eda3bc2233074a739b36552b6
+        URL https://files.kde.org/krita/build/dependencies/PyQt5_gpl-5.9.2.zip
+        URL_MD5 67eacf2f486f77136c9758e03fe6889e
         PATCH_COMMAND  ${PATCH_COMMAND} -p1 -i ${CMAKE_CURRENT_SOURCE_DIR}/pyqt-configure-fix.patch
 
         CONFIGURE_COMMAND ${PYTHON_EXECUTABLE} <SOURCE_DIR>/configure.py ${_PYQT_conf}
         BUILD_COMMAND mingw32-make -j${SUBMAKE_JOBS} CXXFLAGS=-D_hypot=hypot LDFLAGS=${SECURITY_SHARED_LINKER_FLAGS}
         INSTALL_COMMAND mingw32-make -j${SUBMAKE_JOBS} install
         
         BUILD_IN_SOURCE 1
 
         UPDATE_COMMAND ""
     )
 
 endif()
 
diff --git a/3rdparty/ext_sip/CMakeLists.txt b/3rdparty/ext_sip/CMakeLists.txt
index e5fe7624ec..8924d77240 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://files.kde.org/krita/build/dependencies/sip-4.19.12.tar.gz
-        URL_MD5 e28b0790dfe4962ce6bbd7c4772f40c9
+        URL https://files.kde.org/krita/build/dependencies/sip-4.19.6.tar.gz
+        URL_MD5 6be5cb2c43915ed450a9f74ec110dada
 
         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://files.kde.org/krita/build/dependencies/sip-4.19.12.zip
-        URL_MD5 6be7fb646a862cb0c3340e99475700c3
+        URL https://files.kde.org/krita/build/dependencies/sip-4.19.6.zip
+        URL_MD5 6a4080268c2aa9225965415fe8706967
 
         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()