diff --git a/desktop/kde/applications/cantor/pspec.xml b/desktop/kde/applications/cantor/pspec.xml
index 5dd85d1fbb..412fc64dd1 100755
--- a/desktop/kde/applications/cantor/pspec.xml
+++ b/desktop/kde/applications/cantor/pspec.xml
@@ -34,24 +34,35 @@
             <Dependency>analitza-devel</Dependency>
             <Dependency>libqalculate-devel</Dependency>
             <Dependency>cln-devel</Dependency>
+            <!-- optionally -->
+            <Dependency>libspectre-devel</Dependency>
+            <Dependency>python-devel</Dependency>
+            <Dependency>python3-devel</Dependency>
+            <Dependency>R-devel</Dependency>
+            <Dependency>luajit-devel</Dependency>
         </BuildDependencies>
     </Source>
 
     <Package>
         <Name>cantor</Name>
         <RuntimeDependencies>
+            <Dependency>R</Dependency>
             <Dependency>cln</Dependency>
             <Dependency>kio</Dependency>
             <Dependency>kpty</Dependency>
             <Dependency>ki18n</Dependency>
             <Dependency>kparts</Dependency>
+            <Dependency>kcrash</Dependency>
             <Dependency>libgcc</Dependency>
+            <Dependency>python</Dependency>
+            <Dependency>luajit</Dependency>
+            <Dependency>python3</Dependency>
             <Dependency>kconfig</Dependency>
             <Dependency>kxmlgui</Dependency>
             <Dependency>analitza</Dependency>
             <Dependency>karchive</Dependency>
             <Dependency>kservice</Dependency>
-            <Dependency versionFrom="5.7.1">qt5-base</Dependency>
+            <Dependency>libspectre</Dependency>
             <Dependency>knewstuff</Dependency>
             <Dependency>kcompletion</Dependency>
             <Dependency>kcoreaddons</Dependency>
@@ -61,8 +72,9 @@
             <Dependency>libqalculate</Dependency>
             <Dependency>kconfigwidgets</Dependency>
             <Dependency>kwidgetsaddons</Dependency>
-            <Dependency versionFrom="5.7.1">qt5-xmlpatterns</Dependency>
             <Dependency>kdelibs4-support</Dependency>
+            <Dependency versionFrom="5.7.1">qt5-base</Dependency>
+            <Dependency versionFrom="5.7.1">qt5-xmlpatterns</Dependency>
         </RuntimeDependencies>
         <Files>
             <Path fileType="config">/etc</Path>
@@ -107,7 +119,7 @@
 
     <History>
         <Update release="20">
-            <Date>2018-10-10</Date>
+            <Date>2018-10-13</Date>
             <Version>18.08.2</Version>
             <Comment>Version bump.</Comment>
             <Name>Mustafa Cinasal</Name>
@@ -247,4 +259,4 @@
             <Email>yusuf.aydemir@pisilinux.org</Email>
         </Update>
     </History>
-</PISI>
+</PISI>
\ No newline at end of file