diff --git a/build.gradle b/build.gradle
index f973588..f82c2f9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,7 +24,7 @@ subprojects {
 	apply plugin: 'eclipse'
 
 	// java compatibility version
-	sourceCompatibility = 1.8
+	sourceCompatibility = 10
 	
 
 	configurations {
diff --git a/data-store/build.gradle b/data-store/build.gradle
index d921112..90090c8 100644
--- a/data-store/build.gradle
+++ b/data-store/build.gradle
@@ -6,7 +6,7 @@ dependencies {
 	compile project(':pdb-utils')
 	antlr "org.antlr:antlr4:4.7.1"
 	
-	compile 'org.lucares:primitiveCollections:0.1.20171228131833'
+	compile 'org.lucares:primitiveCollections:0.1.20180817193843'
 	compile 'org.apache.commons:commons-lang3:3.7'
 	compile 'com.google.guava:guava:26.0-jre'
 
diff --git a/pdb-plotting/build.gradle b/pdb-plotting/build.gradle
index 5416b4c..0fb20d8 100644
--- a/pdb-plotting/build.gradle
+++ b/pdb-plotting/build.gradle
@@ -1,7 +1,7 @@
 
 dependencies {
 	compile project(':performanceDb')
-	compile 'org.lucares:primitiveCollections:0.1.20171228131833'
+	compile 'org.lucares:primitiveCollections:0.1.20180817193843'
 	compile 'com.fasterxml.jackson.core:jackson-databind:2.9.6'
 	compile 'com.google.guava:guava:26.0-jre'
 }