diff --git a/Telegram/build/prepare/prepare.py b/Telegram/build/prepare/prepare.py
index ca821bf61..1d638192f 100644
--- a/Telegram/build/prepare/prepare.py
+++ b/Telegram/build/prepare/prepare.py
@@ -400,7 +400,7 @@ if customRunCommand:
 stage('patches', """
     git clone https://github.com/desktop-app/patches.git
     cd patches
-    git checkout 49d233d5de
+    git checkout 2ccddbe673
 """)
 
 stage('depot_tools', """
@@ -1113,30 +1113,30 @@ release:
 """)
 
 if buildQt5:
-    stage('qt_5_15_2', """
-    git clone https://code.qt.io/qt/qt5.git qt_5_15_2
-    cd qt_5_15_2
+    stage('qt_5_15_3', """
+    git clone https://code.qt.io/qt/qt5.git qt_5_15_3
+    cd qt_5_15_3
     perl init-repository --module-subset=qtbase,qtimageformats,qtsvg
-    git checkout v5.15.2
+    git checkout v5.15.3-lts-lgpl
     git submodule update qtbase qtimageformats qtsvg
-depends:patches/qtbase_5_15_2/*.patch
+depends:patches/qtbase_5_15_3/*.patch
     cd qtbase
 win:
-    for /r %%i in (..\\..\\patches\\qtbase_5_15_2\\*) do git apply %%i
+    for /r %%i in (..\\..\\patches\\qtbase_5_15_3\\*) do git apply %%i
     cd ..
 
     SET CONFIGURATIONS=-debug
 release:
     SET CONFIGURATIONS=-debug-and-release
 win:
-    """ + removeDir("\"%LIBS_DIR%\\Qt-5.15.2\"") + """
+    """ + removeDir("\"%LIBS_DIR%\\Qt-5.15.3\"") + """
     SET ANGLE_DIR=%LIBS_DIR%\\tg_angle
     SET ANGLE_LIBS_DIR=%ANGLE_DIR%\\out
     SET MOZJPEG_DIR=%LIBS_DIR%\\mozjpeg
     SET OPENSSL_DIR=%LIBS_DIR%\\openssl
     SET OPENSSL_LIBS_DIR=%OPENSSL_DIR%\\out
     SET ZLIB_LIBS_DIR=%LIBS_DIR%\\zlib\\contrib\\vstudio\\vc14\\%X8664%
-    configure -prefix "%LIBS_DIR%\\Qt-5.15.2" ^
+    configure -prefix "%LIBS_DIR%\\Qt-5.15.3" ^
         %CONFIGURATIONS% ^
         -force-debug-info ^
         -opensource ^
@@ -1167,14 +1167,14 @@ win:
     jom -j16
     jom -j16 install
 mac:
-    find ../../patches/qtbase_5_15_2 -type f -print0 | sort -z | xargs -0 git apply
+    find ../../patches/qtbase_5_15_3 -type f -print0 | sort -z | xargs -0 git apply
     cd ..
 
     CONFIGURATIONS=-debug
 release:
     CONFIGURATIONS=-debug-and-release
 mac:
-    ./configure -prefix "$USED_PREFIX/Qt-5.15.2" \
+    ./configure -prefix "$USED_PREFIX/Qt-5.15.3" \
         $CONFIGURATIONS \
         -force-debug-info \
         -opensource \
diff --git a/cmake b/cmake
index aa71b768b..3aa9ec0ed 160000
--- a/cmake
+++ b/cmake
@@ -1 +1 @@
-Subproject commit aa71b768bd6e958753a5e5ced5203d65cc93a6b1
+Subproject commit 3aa9ec0ed16b6a83bb3af14ba803ab59b512397f