diff --git a/build.gradle b/build.gradle
index 53bd565..31fac9b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,6 +30,8 @@ contacts {
     }
 }
 
+compileGroovy.groovyOptions.configurationScript = file('src/groovyCompile/groovycConfig.groovy')
+
 dependencies {
     compile 'com.netflix.nebula:nebula-gradle-interop:latest.release'
     compile 'org.apache.maven:maven-model-builder:3.+'
diff --git a/src/groovyCompile/groovycConfig.groovy b/src/groovyCompile/groovycConfig.groovy
new file mode 100644
index 0000000..19ca2df
--- /dev/null
+++ b/src/groovyCompile/groovycConfig.groovy
@@ -0,0 +1,6 @@
+import org.codehaus.groovy.control.customizers.builder.CompilerCustomizationBuilder
+import groovy.transform.CompileStatic
+
+CompilerCustomizationBuilder.withConfig(configuration) {
+    ast(CompileStatic)
+}
\ No newline at end of file
diff --git a/src/main/groovy/netflix/nebula/dependency/recommender/provider/CustomRecommendationProvider.java b/src/main/groovy/netflix/nebula/dependency/recommender/provider/CustomRecommendationProvider.java
index c147686..8e09f70 100644
--- a/src/main/groovy/netflix/nebula/dependency/recommender/provider/CustomRecommendationProvider.java
+++ b/src/main/groovy/netflix/nebula/dependency/recommender/provider/CustomRecommendationProvider.java
@@ -1,7 +1,6 @@
 package netflix.nebula.dependency.recommender.provider;
 
 import groovy.lang.Closure;
-
 public class CustomRecommendationProvider extends AbstractRecommendationProvider {
     private Closure versionFunction;
 
diff --git a/src/main/groovy/netflix/nebula/dependency/recommender/provider/DependencyLockProvider.groovy b/src/main/groovy/netflix/nebula/dependency/recommender/provider/DependencyLockProvider.groovy
index 1692cc8..a658aa7 100644
--- a/src/main/groovy/netflix/nebula/dependency/recommender/provider/DependencyLockProvider.groovy
+++ b/src/main/groovy/netflix/nebula/dependency/recommender/provider/DependencyLockProvider.groovy
@@ -16,16 +16,16 @@ class DependencyLockProvider extends FileBasedRecommendationProvider {
     String getVersion(String org, String name) throws Exception {
         if (!recommendations) {
             input.withCloseable {
-                final locks = new JsonSlurper().parse(it)
-                final isDependencyLock4Format = locks.every {
+                final Map<String, Map<String, String>> locks = (Map<String, Map<String, String>>) new JsonSlurper().parse(it)
+                final boolean isDependencyLock4Format = locks.every {
                     it.value.every {
                         it.value instanceof Map
                     }
                 }
 
                 recommendations = (isDependencyLock4Format ? locks.collectEntries { it.value } : locks).collectEntries {
-                    [(it.key): it.value.locked]
-                }
+                    [(it.key): it.value["locked"]]
+                } as Map<String, String>
             }
         }
         recommendations[org + ':' + name]
diff --git a/src/main/groovy/netflix/nebula/dependency/recommender/provider/IvyRecommendationProvider.groovy b/src/main/groovy/netflix/nebula/dependency/recommender/provider/IvyRecommendationProvider.groovy
index c95e644..5772664 100644
--- a/src/main/groovy/netflix/nebula/dependency/recommender/provider/IvyRecommendationProvider.groovy
+++ b/src/main/groovy/netflix/nebula/dependency/recommender/provider/IvyRecommendationProvider.groovy
@@ -1,5 +1,6 @@
 package netflix.nebula.dependency.recommender.provider
 
+import groovy.transform.CompileDynamic
 import org.gradle.api.Project
 
 class IvyRecommendationProvider extends FileBasedRecommendationProvider {
@@ -7,6 +8,7 @@ class IvyRecommendationProvider extends FileBasedRecommendationProvider {
 
     IvyRecommendationProvider(Project p) { super(p) }
 
+    @CompileDynamic
     @Override
     String getVersion(String org, String name) throws Exception {
         if (versionsByCoord == null) {
@@ -23,7 +25,7 @@ class IvyRecommendationProvider extends FileBasedRecommendationProvider {
 
     @SuppressWarnings("unchecked")
     @Override
-    public InputStreamProvider setModule(Object dependencyNotation) {
+    InputStreamProvider setModule(Object dependencyNotation) {
         if (dependencyNotation == null)
             throw new IllegalArgumentException("Module may not be null")
 
diff --git a/src/main/groovy/netflix/nebula/dependency/recommender/publisher/MavenBomXmlGenerator.groovy b/src/main/groovy/netflix/nebula/dependency/recommender/publisher/MavenBomXmlGenerator.groovy
index 1b91f18..5382596 100644
--- a/src/main/groovy/netflix/nebula/dependency/recommender/publisher/MavenBomXmlGenerator.groovy
+++ b/src/main/groovy/netflix/nebula/dependency/recommender/publisher/MavenBomXmlGenerator.groovy
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 Netflix, Inc.
+ * Copyright 2016-2019 Netflix, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 package netflix.nebula.dependency.recommender.publisher
+
+import groovy.transform.CompileDynamic
 import netflix.nebula.dependency.recommender.ModuleNotationParser
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Configuration
-import org.gradle.api.artifacts.Dependency
 import org.gradle.api.artifacts.ModuleVersionIdentifier
 import org.gradle.api.artifacts.ResolvedDependency
 import org.gradle.api.publish.maven.MavenPublication
@@ -30,7 +31,7 @@ class MavenBomXmlGenerator {
     }
 
     void fromConfigurations(Closure configurationsClosure) {
-        MavenPublication pub = configurationsClosure.delegate.delegate
+        MavenPublication pub = getMavenPublication(configurationsClosure)
 
         Iterable<Configuration> configurations
 
@@ -38,13 +39,13 @@ class MavenBomXmlGenerator {
         if(configurationsRet instanceof Configuration)
             configurations = [(Configuration) configurationsRet]
         else if(Iterable.class.isAssignableFrom(configurationsRet.class))
-            configurations = configurationsRet
+            configurations = configurationsRet as Iterable<Configuration>
 
         generateDependencyManagementXml(pub, { configurations.collect { getManagedDependencies(it) }.flatten() })
     }
 
     void withDependencies(Closure dependenciesClosure) {
-        MavenPublication pub = dependenciesClosure.delegate.delegate
+        MavenPublication pub = getMavenPublication(dependenciesClosure)
 
         Iterable<String> dependencies = null
 
@@ -52,11 +53,12 @@ class MavenBomXmlGenerator {
         if(dependenciesRet instanceof String)
             dependencies = [(String) dependenciesRet]
         else if(Iterable.class.isAssignableFrom(dependenciesRet.class))
-            dependencies = dependenciesRet
+            dependencies = dependenciesRet as Iterable<String>
 
         generateDependencyManagementXml(pub, { dependencies.collect { ModuleNotationParser.parse(it) } })
     }
 
+    @CompileDynamic
     protected static generateDependencyManagementXml(MavenPublication pub, Closure<Iterable<ModuleVersionIdentifier>> deps) {
         pub.pom.withXml {
             Node root = it.asNode()
@@ -78,6 +80,11 @@ class MavenBomXmlGenerator {
         }
     }
 
+    @CompileDynamic
+    private MavenPublication getMavenPublication(Closure configurationsClosure) {
+        return configurationsClosure.delegate.delegate
+    }
+
     protected static Set<ModuleVersionIdentifier> getManagedDependencies(Configuration configuration) {
         getManagedDependenciesRecursive(configuration.resolvedConfiguration.firstLevelModuleDependencies,
                 new HashSet<ModuleVersionIdentifier>())