diff --git a/programming/language/python3/python3/pspec.xml b/programming/language/python3/python3/pspec.xml
index c82c120d7b..c924551f1c 100644
--- a/programming/language/python3/python3/pspec.xml
+++ b/programming/language/python3/python3/pspec.xml
@@ -15,18 +15,19 @@
         <Archive sha1sum="18ebf7d726782967d967dc00e3aa08b334fbdd5c" type="tarxz">https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tar.xz</Archive>
         <BuildDependencies>
 <!--             <Dependency>valgrind</Dependency> -->
-            <Dependency>tcltk-devel</Dependency>
-            <Dependency>tcl-devel</Dependency>
+            <Dependency>bzip2</Dependency>
             <Dependency>xz-devel</Dependency>
+            <Dependency>tcl-devel</Dependency>
             <Dependency>gdbm-devel</Dependency>
             <Dependency>zlib-devel</Dependency>
-            <Dependency>bzip2</Dependency>
+            <Dependency>tcltk-devel</Dependency>
             <Dependency>expat-devel</Dependency>
             <Dependency>libffi-devel</Dependency>
             <Dependency>sqlite-devel</Dependency>
             <Dependency>ncurses-devel</Dependency>
             <Dependency>openssl-devel</Dependency>
             <Dependency>readline-devel</Dependency>
+            <Dependency>mpdecimal-devel</Dependency>
         </BuildDependencies>
         <Patches>
             <Patch level="1">dont-make-libpython-readonly.patch</Patch>
@@ -46,6 +47,7 @@
             <Dependency>ncurses</Dependency>
             <Dependency>openssl</Dependency>
             <Dependency>readline</Dependency>
+            <Dependency>mpdecimal</Dependency>
         </RuntimeDependencies>
         <Files>
             <Path fileType="executable" permanent="0">/usr/bin/p*</Path>
@@ -188,4 +190,4 @@
             <Email>marcin@pisilinux.org</Email>
         </Update>
     </History>
-</PISI>
+</PISI>
\ No newline at end of file