diff --git a/.gitignore b/.gitignore
index 7763a3a..e48a70c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 build/
 .idea/
 *.iml
+.project
 
 # Ignore Gradle GUI config
 gradle-app.setting
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2ba65a..4d694ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # gradle-opencover-plugin changelog
 
+## 1.13
+### Fixed
+* Do not evaluate targetAssemblies when applying the plugin
+
+### Changed
+* Remove gpars and use parallelStream instead
+
 ## 1.11
 ### Added
 * Add threshold parameter for OpenCover. [usage] (https://github.com/OpenCover/opencover/wiki/Usage).
diff --git a/build.gradle b/build.gradle
index fd2a8fc..4b44f5b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,8 +6,7 @@ plugins {
 apply plugin: 'groovy'
 
 dependencies {
-    compile 'commons-io:commons-io:1.3.2'
-    compile 'org.codehaus.gpars:gpars:1.2.1'
+    compile 'commons-io:commons-io:2.6'
     compile 'com.ullink.gradle:gradle-nunit-plugin:1.12'
 }
 
diff --git a/src/main/groovy/com/ullink/gradle/opencover/OpenCover.groovy b/src/main/groovy/com/ullink/gradle/opencover/OpenCover.groovy
index f2d0718..d0d5b10 100644
--- a/src/main/groovy/com/ullink/gradle/opencover/OpenCover.groovy
+++ b/src/main/groovy/com/ullink/gradle/opencover/OpenCover.groovy
@@ -1,11 +1,9 @@
 package com.ullink.gradle.opencover
 
-import groovyx.gpars.GParsPool
 import org.apache.commons.io.FilenameUtils
 import org.gradle.api.DefaultTask
 import org.gradle.api.GradleException
 import org.gradle.api.Task
-import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.provider.ListProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.InputFiles
@@ -22,8 +20,9 @@ class OpenCover extends DefaultTask {
     Property<Boolean> parallelForks
     ListProperty<String> parallelTargetExecArgs
     Property<String> registerMode
+
     @InputFiles
-    ConfigurableFileCollection targetAssemblies
+    ListProperty<File> targetAssemblies
     def excludeByFile
     def excludeByAttribute
     def hideSkipped
@@ -45,6 +44,7 @@ class OpenCover extends DefaultTask {
         targetExecArgs = project.getObjects().listProperty(String)
         parallelForks = project.getObjects().property(Boolean)
         parallelTargetExecArgs = project.getObjects().listProperty(String)
+        targetAssemblies = project.getObjects().listProperty(File)
 
         registerMode.set('user')
     }
@@ -104,7 +104,7 @@ class OpenCover extends DefaultTask {
         if (hideSkipped) commandLineArgs += '-hideskipped:' + hideSkipped
         if (threshold) commandLineArgs += '-threshold:' + threshold
 
-        def filters = targetAssemblies.collect { "+[${FilenameUtils.getBaseName(it.name)}]*" }
+        def filters = targetAssemblies.get().collect { "+[${FilenameUtils.getBaseName(it.name)}]*" }
         commandLineArgs += '-filter:\\"' + filters.join(' ') + '\\"'
 
         commandLineArgs += "-target:${targetExec.get()}"
@@ -123,15 +123,15 @@ class OpenCover extends DefaultTask {
     def runMultipleOpenCovers(ArrayList commandLineArgs) {
         def execArgs = parallelTargetExecArgs.get()
         logger.info "Preparing to run ${execArgs.size()} tests..."
-        GParsPool.withPool {
-            execArgs.eachParallel {
+
+        execArgs.parallelStream()
+            .forEach {
                 def fileName = "${fileNameId.getAndIncrement()}"
                 logger.info("Filename generated for the ${it} input was ${fileName}")
                 def currentTestArgs = ["\"-targetargs:${it.collect({ escapeArg(it) }).join(' ')}\""]
                 currentTestArgs += "-output:${new File(reportsFolder, fileName + ".xml")}"
                 execute(commandLineArgs + currentTestArgs)
             }
-        }
     }
 
     def escapeArg(arg) {
diff --git a/src/main/groovy/com/ullink/gradle/opencover/OpenCoverPlugin.groovy b/src/main/groovy/com/ullink/gradle/opencover/OpenCoverPlugin.groovy
index 1af1950..f3e4602 100644
--- a/src/main/groovy/com/ullink/gradle/opencover/OpenCoverPlugin.groovy
+++ b/src/main/groovy/com/ullink/gradle/opencover/OpenCoverPlugin.groovy
@@ -27,13 +27,13 @@ class OpenCoverPlugin implements Plugin<Project> {
 
         project.plugins.withId('com.ullink.msbuild') {
             def msbuildTask = project.tasks.msbuild
-            task.targetAssemblies = project.files (
+            task.targetAssemblies.set(project.provider {
                 msbuildTask.projects.findAll {
                     !(it.key =~ 'test') && it.value.properties.TargetPath
                 }.collect {
-                    it.value.getProjectPropertyPath('TargetPath').toString()
+                    project.file(it.value.getProjectPropertyPath('TargetPath').toString())
                 }
-            )
+            })
         }
     }