diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 4d1216a..1a50f19 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -9,10 +9,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - name: Set up JDK 1.8
+    - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Run unit tests
       run: ./gradlew test
     - name: Determine coverage
diff --git a/build.gradle b/build.gradle
index 10a9bde..d9f715b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -86,7 +86,7 @@ gradle.projectsEvaluated {
 }
 
 dependencies {
-    implementation 'org.rundeck:rundeck-core:3.2.0-20191218'
+    implementation 'org.rundeck:rundeck-core:3.+'
 
     testImplementation group: 'junit', name: 'junit', version:'4.12'
 
diff --git a/src/main/java/com/bioraft/rundeck/nexus/BranchOrVersion.java b/src/main/java/com/bioraft/rundeck/nexus/BranchOrVersion.java
index f867cd8..0b90bc1 100644
--- a/src/main/java/com/bioraft/rundeck/nexus/BranchOrVersion.java
+++ b/src/main/java/com/bioraft/rundeck/nexus/BranchOrVersion.java
@@ -76,9 +76,15 @@ public String getVersion() {
 	public BranchOrVersion(String path) {
 		artifactId = component(path);
 		String tag = tag(path);
-		build = tag.replaceFirst("^.*" + BUILD_SEPARATOR_REGEX + "([a-zA-Z0-9]+)$", "$1");
-		versionOrBranch = tag.replaceFirst("^(.*)" + BUILD_SEPARATOR_REGEX + build + "$", "$1");
-		sep = tag.replaceFirst("^.*(" + BUILD_SEPARATOR_REGEX + ")" + build + "$", "$1");
+		if (tag.matches("^.+" + BUILD_SEPARATOR_REGEX + "[a-zA-Z0-9]+$")) {
+			build = tag.replaceFirst("^.+" + BUILD_SEPARATOR_REGEX + "([a-zA-Z0-9]+)$", "$1");
+			versionOrBranch = tag.replaceFirst("^(.+)" + BUILD_SEPARATOR_REGEX + build + "$", "$1");
+			sep = tag.replaceFirst("^.+(" + BUILD_SEPARATOR_REGEX + ")" + build + "$", "$1");
+		} else {
+			build = "";
+			versionOrBranch = tag;
+			sep = "";
+		}
 		this.parts = versionOrBranch.split("[.]");
 	}
 
diff --git a/src/test/java/com/bioraft/rundeck/nexus/Nexus3OptionProviderTest.java b/src/test/java/com/bioraft/rundeck/nexus/Nexus3OptionProviderTest.java
index 19e92a1..55c1781 100644
--- a/src/test/java/com/bioraft/rundeck/nexus/Nexus3OptionProviderTest.java
+++ b/src/test/java/com/bioraft/rundeck/nexus/Nexus3OptionProviderTest.java
@@ -299,6 +299,20 @@ public void returnsFourItemsForOneBranchAndTwoBareSemanticReleases() throws IOEx
 		assertEquals("COMP_NAME:14.2.3-4", options.get(3).getName());
 	}
 
+	@Test
+	public void handlesTagsWithoutBuildSpecifier() throws IOException {
+		when(client.newCall(any())).thenReturn(call);
+		String json = "{\"items\":[" + item("v141.1") + "," + item("rc141.1raft4711a") + "]}";
+		when(call.execute()).thenReturn(response(json));
+
+		Nexus3OptionProvider provider = new Nexus3OptionProvider(client);
+		List<OptionValue> options = provider.getOptionValues(configuration);
+
+		assertEquals(3, options.size());
+		assertEquals("COMP_NAME:rc141.1raft4711a", options.get(1).getName());
+		assertEquals("COMP_NAME:v141.1", options.get(0).getName());
+	}
+
 	@Test
 	public void sortsBuildNumbersNumerically() throws IOException {
 		when(client.newCall(any())).thenReturn(call);