diff --git a/desktop/kde/applications/calendarsupport/files/qt5.patch b/desktop/kde/applications/calendarsupport/files/qt5.patch
new file mode 100644
index 0000000000..645e3e469a
--- /dev/null
+++ b/desktop/kde/applications/calendarsupport/files/qt5.patch
@@ -0,0 +1,12 @@
+diff -Nuar a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2017-12-08 04:03:49.000000000 +0300
++++ b/CMakeLists.txt	2017-12-17 00:25:23.527037197 +0300
+@@ -28,7 +28,7 @@
+ set(CALENDARSUPPORT_LIB_VERSION ${PIM_VERSION})
+ set(AKONADI_MIMELIB_VERSION "5.7.0")
+ set(KDEPIM_LIB_VERSION "5.7.0")
+-set(QT_REQUIRED_VERSION "5.8.0")
++set(QT_REQUIRED_VERSION "5.7.1")
+ set(KMIME_LIB_VERSION "5.7.0")
+ set(CALENDARUTILS_LIB_VERSION "5.7.0")
+ set(KCALENDARCORE_LIB_VERSION "5.7.0")
diff --git a/desktop/kde/applications/calendarsupport/pspec.xml b/desktop/kde/applications/calendarsupport/pspec.xml
index aa5bee53d7..ec45ccffa1 100644
--- a/desktop/kde/applications/calendarsupport/pspec.xml
+++ b/desktop/kde/applications/calendarsupport/pspec.xml
@@ -10,7 +10,7 @@
         <IsA>app:console</IsA>
         <Summary>Calendar support library</Summary>
         <Description>Calendar support library</Description>
-        <Archive type="tarxz" sha1sum="0d13dc3e6ab2920106abe993bf469c62ecc11598">mirrors://kde/stable/applications/17.08.3/src/calendarsupport-17.08.3.tar.xz</Archive>
+        <Archive type="tarxz" sha1sum="79c0ebbd13cd05f501e8a8f8f91f172593e5c13e">mirrors://kde/stable/applications/17.12.0/src/calendarsupport-17.12.0.tar.xz</Archive>
         <BuildDependencies>
             <Dependency>extra-cmake-modules</Dependency>
             <Dependency versionFrom="5.7.1">qt5-base-devel</Dependency>
@@ -44,6 +44,9 @@
             <Dependency>akonadi-mime-devel</Dependency>
             <Dependency>akonadi-contacts-devel</Dependency>
         </BuildDependencies>
+        <Patches>
+            <Patch>qt5.patch</Patch>
+        </Patches>
     </Source>
 
     <Package>
@@ -95,6 +98,13 @@
     </Package>
 
     <History>
+        <Update release="13">
+            <Date>2017-12-15</Date>
+            <Version>17.12.0</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="12">
             <Date>2017-11-11</Date>
             <Version>17.08.3</Version>