diff --git a/buildSrc/src/main/groovy/org/tangram/gradle/plugin/TangramVersions.groovy b/buildSrc/src/main/groovy/org/tangram/gradle/plugin/TangramVersions.groovy
index f4e6f558..8ddd215f 100644
--- a/buildSrc/src/main/groovy/org/tangram/gradle/plugin/TangramVersions.groovy
+++ b/buildSrc/src/main/groovy/org/tangram/gradle/plugin/TangramVersions.groovy
@@ -31,7 +31,7 @@ public class TangramVersions {
   String servlet_api = 'javax.servlet:javax.servlet-api:3.1.0'
   String jsp_api = 'javax.servlet.jsp:jsp-api:2.2'
   String groovy = '2.4.6'
-  String asm = '4.0'
+  String asm = '5.1'
   String velocity = '1.7'
   String slf4j = '1.7.20'
   String log4j = '1.2.17'
@@ -47,7 +47,9 @@ public class TangramVersions {
 
   // For testing purposes
   String junit = '4.12'
-  String testng = '6.3.1' // Gradle 2.10 has 6.3.1 - tests fail with other versions - latest is 6.9.11
+  String testng = '6.9.11' // Gradle 2.12 has 6.3.1 - tests using e.g. testng listeners fail with other versions
+  String hsqldb = '1.8.1.1'
+  String h2db = '1.4.191'
 
   // The dependency injection options
   String dinistiq = '0.5'
diff --git a/ebean/build.gradle b/ebean/build.gradle
index 13b95c34..9450dd8a 100644
--- a/ebean/build.gradle
+++ b/ebean/build.gradle
@@ -36,7 +36,7 @@ dependencies {
   testCompile project (':tangram-core').sourceSets.test.output
   testCompile "org.springframework:spring-core:$versions.springframework"
   testCompile "org.springframework:spring-test:$versions.springframework"
-  testCompile "com.h2database:h2:1.4.191"
+  testCompile "com.h2database:h2:$versions.h2db"
 }
 
 compileTestJava.doLast {
diff --git a/jpa/build.gradle b/jpa/build.gradle
index 76b250a2..12778f54 100644
--- a/jpa/build.gradle
+++ b/jpa/build.gradle
@@ -44,7 +44,7 @@ dependencies {
   testCompile project (':tangram-core').sourceSets.test.output
   testCompile "org.springframework:spring-core:$versions.springframework"
   testCompile "org.springframework:spring-test:$versions.springframework"
-  testCompile "hsqldb:hsqldb:1.8.0.10"
+  testCompile "hsqldb:hsqldb:$versions.hsqldb"
 }
 
 // For Java EE environments
diff --git a/nucleus/build.gradle b/nucleus/build.gradle
index f6347f2e..149c3552 100644
--- a/nucleus/build.gradle
+++ b/nucleus/build.gradle
@@ -38,7 +38,7 @@ dependencies {
   testCompile project (':tangram-core').sourceSets.test.output
   testCompile "org.datanucleus:datanucleus-rdbms:$versions.datanucleus"
   testCompile "$versions.jdo_api"
-  testCompile "hsqldb:hsqldb:1.8.0.10"
+  testCompile "hsqldb:hsqldb:$versions.hsqldb"
 }
 
 compileTestJava.doLast {