diff --git a/.github/workflows/ktlint.yml b/.github/workflows/ktlint.yml
index 31fc19f..aa4e492 100644
--- a/.github/workflows/ktlint.yml
+++ b/.github/workflows/ktlint.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: actions/setup-java@v2
         with:
           distribution: 'zulu'
-          java-version: '17'
+          java-version: '21'
       - run: |
           curl -sSLO https://github.com/pinterest/ktlint/releases/download/1.2.1/ktlint && chmod a+x ktlint && sudo mv ktlint /usr/local/bin/
       - name: run ktlint
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3b4edb9..2d0423b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,6 +15,6 @@ jobs:
       - uses: actions/setup-java@v2
         with:
           distribution: 'zulu'
-          java-version: '17'
+          java-version: '21'
       - name: run tests
         run: ./gradlew test -PisGithubActions
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index 55bcc3c..a32873d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -18,7 +18,7 @@ if (!project.hasProperty("isGithubActions")) {
 }
 
 group = "io.newm"
-version = "2.1.0-SNAPSHOT"
+version = "2.2.0-SNAPSHOT"
 
 java.sourceCompatibility = JavaVersion.VERSION_21
 java.targetCompatibility = JavaVersion.VERSION_21
diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index 48e925a..eeb15f7 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -1,5 +1,5 @@
 object Versions {
-    const val COMMONS_LOGGING = "1.3.0"
+    const val COMMONS_LOGGING = "1.3.1"
     const val COMMONS_NUMBERS = "1.1"
     const val COROUTINES = "1.8.0"
     const val GOOGLE_TRUTH = "1.4.2"
diff --git a/src/main/kotlin/io/newm/kogmios/protocols/model/serializers/UtxoOutputValueSerializer.kt b/src/main/kotlin/io/newm/kogmios/protocols/model/serializers/UtxoOutputValueSerializer.kt
index 4e4d007..ab17cb9 100644
--- a/src/main/kotlin/io/newm/kogmios/protocols/model/serializers/UtxoOutputValueSerializer.kt
+++ b/src/main/kotlin/io/newm/kogmios/protocols/model/serializers/UtxoOutputValueSerializer.kt
@@ -26,12 +26,15 @@ object UtxoOutputValueSerializer : KSerializer<UtxoOutputValue> {
         val adaMap = elements["ada"] ?: throw IllegalStateException("ada value not found in UtxoOutputValue")
         val lovelace = adaMap["lovelace"] ?: throw IllegalStateException("lovelace value not found in UtxoOutputValue")
         val assets =
-            elements.entries.filterNot { it.key == "ada" }.map {
-                Asset(
-                    policyId = it.key,
-                    name = it.value.keys.first(),
-                    quantity = it.value.values.first()
-                )
+            elements.entries.filterNot { it.key == "ada" }.flatMap { policy ->
+                val policyId = policy.key
+                policy.value.map {
+                    Asset(
+                        policyId = policyId,
+                        name = it.key,
+                        quantity = it.value
+                    )
+                }
             }
         return UtxoOutputValue(
             ada = Ada(Lovelace(lovelace)),