diff --git a/build.gradle b/build.gradle
index d6926072..c92770d9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,16 +38,16 @@ dependencies {
     compile 'com.fasterxml.jackson.core:jackson-databind:2.3.2'
     
     testCompile 'org.hamcrest:hamcrest:2.+'
-    testCompile 'org.junit.jupiter:junit-jupiter-api:5.+'
-    testCompile 'org.junit.jupiter:junit-jupiter-params:5.+'
-    testCompile 'org.mockito:mockito-core:2.+'
-    testCompile 'org.mockito:mockito-junit-jupiter:2.+'
+    testCompile 'org.junit.jupiter:junit-jupiter-api:5.3.2'
+    testCompile 'org.junit.jupiter:junit-jupiter-params:5.3.2'
+    testCompile 'org.mockito:mockito-core:2.23.4'
+    testCompile 'org.mockito:mockito-junit-jupiter:2.23.4'
     
-    runtime 'org.junit.platform:junit-platform-runner:1.+'
-    runtime 'org.junit.jupiter:junit-jupiter-engine:5.+'
+    runtime 'org.junit.platform:junit-platform-runner:1.3.2'
+    runtime 'org.junit.jupiter:junit-jupiter-engine:5.3.2'
     runtime 'ch.qos.logback:logback-classic:1.1.3'
 
-    asciidoclet 'org.asciidoctor:asciidoclet:1.+'
+    asciidoclet 'org.asciidoctor:asciidoclet:1.5.6'
 }
 
 task sourcesJar(type: Jar) {