diff --git a/pharo-porting/changes_for_pharo.st b/pharo-porting/changes_for_pharo.st
index 9de32d1..99fbdc0 100644
--- a/pharo-porting/changes_for_pharo.st
+++ b/pharo-porting/changes_for_pharo.st
@@ -2,17 +2,17 @@
 SIPURandom class extend [
     nextByte [
         <category: 'random'>
-        ^(RAND rand: 1) first.
+        ^(OsmoSecureRandom rand: 1) first.
     ]
 
     nextInt [
         <category: 'random'>
-        ^(RAND rand: 4) asInteger
+        ^(OsmoSecureRandom rand: 4) asInteger
     ]
 
     nextFourBytes [
         <category: 'random'>
-        ^RAND rand: 4
+        ^OsmoSecureRandom rand: 4
     ]
 ]
 
@@ -20,14 +20,14 @@ SIPUserAgentBase class extend [
     generateCSeq [
         <category: 'helper'>
         "For pharo just use the random we have"
-        ^(RAND rand: 4) asInteger abs
+        ^(OsmoSecureRandom rand: 4) asInteger abs
     ]
 
     generateBranch [
         | data |
         data := '<1p>,<2p>' expandMacrosWithArguments:
                     {DateTime now asUTC asSeconds.
-                     (RAND rand: 2) asInteger}.
+                     (OsmoSecureRandom rand: 2) asInteger}.
         ^ self branchStart, (SIPBase64 encode: data).
     ]
 ]