diff --git a/library/async/build.gradle b/library/async/build.gradle
index 4136617..48bcb3a 100644
--- a/library/async/build.gradle
+++ b/library/async/build.gradle
@@ -1,6 +1,22 @@
 apply plugin: 'java'
 apply plugin: 'com.novoda.bintray-release'
 
+// custom tasks for creating source/javadoc jars
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+// add javadoc/source jar tasks as artifacts
+artifacts {
+    archives sourcesJar, javadocJar
+}
+
 publish {
     groupId = 'com.github.amatkivskiy'
     artifactId = 'gitter.sdk.async'
diff --git a/library/core/build.gradle b/library/core/build.gradle
index c899173..6a48473 100644
--- a/library/core/build.gradle
+++ b/library/core/build.gradle
@@ -3,6 +3,22 @@ apply plugin: 'com.novoda.bintray-release'
 
 version '1.6.0'
 
+// custom tasks for creating source/javadoc jars
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+// add javadoc/source jar tasks as artifacts
+artifacts {
+    archives sourcesJar, javadocJar
+}
+
 publish {
     groupId = 'com.github.amatkivskiy'
     artifactId = 'gitter.sdk.core'
@@ -17,4 +33,5 @@ publish {
 dependencies {
     compile 'com.squareup.retrofit:retrofit:1.9.0'
     testCompile 'junit:junit:4.12'
-}
\ No newline at end of file
+}
+
diff --git a/library/rx/build.gradle b/library/rx/build.gradle
index 9dfa866..a919c6e 100644
--- a/library/rx/build.gradle
+++ b/library/rx/build.gradle
@@ -10,6 +10,22 @@ jacocoTestReport {
     }
 }
 
+// custom tasks for creating source/javadoc jars
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+// add javadoc/source jar tasks as artifacts
+artifacts {
+    archives sourcesJar, javadocJar
+}
+
 publish {
     groupId = 'com.github.amatkivskiy'
     artifactId = 'gitter.sdk.rx'
@@ -31,3 +47,4 @@ dependencies {
     testCompile 'org.hamcrest:hamcrest-core:1.3'
     testCompile 'com.squareup.okhttp3:mockwebserver:3.2.0'
 }
+
diff --git a/library/sync/build.gradle b/library/sync/build.gradle
index 0d8f49a..41d217f 100644
--- a/library/sync/build.gradle
+++ b/library/sync/build.gradle
@@ -1,6 +1,22 @@
 apply plugin: 'java'
 apply plugin: 'com.novoda.bintray-release'
 
+// custom tasks for creating source/javadoc jars
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+// add javadoc/source jar tasks as artifacts
+artifacts {
+    archives sourcesJar, javadocJar
+}
+
 publish {
     groupId = 'com.github.amatkivskiy'
     artifactId = 'gitter.sdk.sync'
@@ -14,5 +30,6 @@ publish {
 
 dependencies {
 //    compile 'com.github.amatkivskiy:gitter.sdk.core:1.5'
-        compile project(':library:core')
+    compile project(':library:core')
 }
+