diff --git a/.latest-version b/.latest-version
index 33fa47a..0c8d17c 100644
--- a/.latest-version
+++ b/.latest-version
@@ -1 +1 @@
-20230823213033
+20230901134437
diff --git a/build.gradle b/build.gradle
index 5804742..f2607ad 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = 'edu.stanford.hivdb'
-version = '3.4.5'
+version = '3.4.6'
 
 sourceCompatibility = 15
 targetCompatibility = 15
diff --git a/sierra-core b/sierra-core
index 3076de8..309d2a0 160000
--- a/sierra-core
+++ b/sierra-core
@@ -1 +1 @@
-Subproject commit 3076de8c8c2e2f0297badb0ab392047eb776e6b5
+Subproject commit 309d2a0edaa0779bcce8f64ba7d0679a43361305
diff --git a/sierra-tests/build.gradle b/sierra-tests/build.gradle
index 200eec4..e7ddf29 100644
--- a/sierra-tests/build.gradle
+++ b/sierra-tests/build.gradle
@@ -5,7 +5,7 @@ plugins {
 }
 
 group = 'edu.stanford.hivdb'
-version = '3.4.5'
+version = '3.4.6'
 
 description = """Sierra Unit Tests"""
 
diff --git a/sierra-tests/src/test/java/edu/stanford/hivdb/mutations/MutationSetTest.java b/sierra-tests/src/test/java/edu/stanford/hivdb/mutations/MutationSetTest.java
index 18ed33c..bf66a8e 100644
--- a/sierra-tests/src/test/java/edu/stanford/hivdb/mutations/MutationSetTest.java
+++ b/sierra-tests/src/test/java/edu/stanford/hivdb/mutations/MutationSetTest.java
@@ -397,9 +397,14 @@ public void testGetAmbiguousCodons() {
 		List<Mutation<HIV>> mutations = new ArrayList<>();
 		mutations.add(hiv.parseMutationString("RT215V"));
 		mutations.add(hiv.parseMutationString("RT67N"));
+		 // AHT is the codon for triggering isAmbiguous() returning true
+		mutations.add(hiv.parseMutationString("RT123INT:AHT"));
 		
 		MutationSet<HIV> mSet = new MutationSet<HIV>(mutations);
-		assertNotNull(mSet.getAmbiguousCodons());
+		assertEquals(
+			new MutationSet<>(hiv.parseMutationString("RT123INT")),
+			mSet.getAmbiguousCodons()
+		);
 	}
 	
 	@Test
diff --git a/src/main/resources/version.properties b/src/main/resources/version.properties
index 7459883..9214beb 100644
--- a/src/main/resources/version.properties
+++ b/src/main/resources/version.properties
@@ -1,2 +1,2 @@
-version = 3.4.5
-versionDate = 2023-08-22
+version = 3.4.6
+versionDate = 2023-09-01