diff --git a/language-adaptors/rxjava-jruby/build.gradle b/language-adaptors/rxjava-jruby/build.gradle
index a39b29e099..03e9682ba6 100644
--- a/language-adaptors/rxjava-jruby/build.gradle
+++ b/language-adaptors/rxjava-jruby/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'idea'
 
 dependencies {
     compile project(':rxjava-core')
-    compile 'org.jruby:jruby:1.7.2'
+    compile 'org.jruby:jruby:1.6.3'
     provided 'junit:junit:4.10'
     provided 'org.mockito:mockito-core:1.8.5'
 }
diff --git a/language-adaptors/rxjava-scala/build.gradle b/language-adaptors/rxjava-scala/build.gradle
index 72078bfe7d..33793fed9c 100644
--- a/language-adaptors/rxjava-scala/build.gradle
+++ b/language-adaptors/rxjava-scala/build.gradle
@@ -14,18 +14,18 @@ tasks.withType(ScalaCompile) {
 
 dependencies {
     // Scala compiler and related tools
-    scalaTools 'org.scala-lang:scala-compiler:2.10.0'
-    scalaTools 'org.scala-lang:scala-library:2.10.0'
+    scalaTools 'org.scala-lang:scala-compiler:2.9.1'
+    scalaTools 'org.scala-lang:scala-library:2.9.1'
 
-    provided 'org.scala-lang:scala-library:2.10.0'
-    provided 'org.scala-lang:scala-reflect:2.10.0'
-    provided 'org.scalatest:scalatest_2.10:1.9.1'
+    provided 'org.scala-lang:scala-library:2.9.1'
+//    provided 'org.scala-lang:scala-reflect:2.9.1'
+    provided 'org.scalatest:scalatest_2.9.1:1.8'
 
     compile project(':rxjava-core')
     provided 'junit:junit:4.10'
     provided 'org.mockito:mockito-core:1.8.5'
 
-    testCompile 'org.scalatest:scalatest_2.10:1.9.1'
+    testCompile 'org.scalatest:scalatest_2.9.1:1.8'
 }
 
 task test(overwrite: true, dependsOn: testClasses) << {
@@ -36,4 +36,4 @@ task test(overwrite: true, dependsOn: testClasses) << {
     ant.scalatest(runpath: sourceSets.test.classesDir,
             haltonfailure: 'true',
             fork: 'false') {reporter(type: 'stdout')}
-}
\ No newline at end of file
+}
diff --git a/rxjava-core/build.gradle b/rxjava-core/build.gradle
index 499cae4e75..a13686cc51 100644
--- a/rxjava-core/build.gradle
+++ b/rxjava-core/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'eclipse'
 apply plugin: 'idea'
 
 // we want to target Java 1.5 so this can be used on Android
-sourceCompatibility = JavaVersion.VERSION_1_6
+sourceCompatibility = JavaVersion.VERSION_1_5
 targetCompatibility = JavaVersion.VERSION_1_5
 
 dependencies {