diff --git a/.github/workflows/api-breakage.yml b/.github/workflows/api-breakage.yml
index 782db391e3..d2b7195593 100644
--- a/.github/workflows/api-breakage.yml
+++ b/.github/workflows/api-breakage.yml
@@ -8,7 +8,7 @@ jobs:
   linux:
     runs-on: ubuntu-latest
     container:
-      image: swift:5.10
+      image: swift:latest
     steps:
     - name: Checkout
       uses: actions/checkout@v4
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8cc9173b52..5552d721c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,9 +35,9 @@ jobs:
     strategy:
       matrix:
         image:
-          - swift:5.8
           - swift:5.9
           - swift:5.10
+          - swift:6.0
     services:
       localstack:
         image: localstack/localstack
diff --git a/Sources/Soto/Extensions/DynamoDB/DynamoDBEncoder.swift b/Sources/Soto/Extensions/DynamoDB/DynamoDBEncoder.swift
index 60c323bfca..77ff52eea5 100644
--- a/Sources/Soto/Extensions/DynamoDB/DynamoDBEncoder.swift
+++ b/Sources/Soto/Extensions/DynamoDB/DynamoDBEncoder.swift
@@ -382,73 +382,73 @@ class _DynamoDBEncoder: Encoder {
 }
 
 extension _DynamoDBEncoder: SingleValueEncodingContainer {
-    func encode(_ attribute: DynamoDB.AttributeValue) {
+    func encode(attribute: DynamoDB.AttributeValue) {
         self.storage.pushSingleValueContainer(attribute)
     }
 
     func encodeNil() throws {
-        self.encode(.null(true))
+        self.encode(attribute: .null(true))
     }
 
     func encode(_ value: Bool) throws {
-        self.encode(.bool(value))
+        self.encode(attribute: .bool(value))
     }
 
     func encode(_ value: String) throws {
-        self.encode(.s(value))
+        self.encode(attribute: .s(value))
     }
 
     func encode(_ value: Double) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Float) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Int) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Int8) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Int16) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Int32) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: Int64) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: UInt) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: UInt8) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: UInt16) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: UInt32) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: UInt64) throws {
-        self.encode(.n(value.description))
+        self.encode(attribute: .n(value.description))
     }
 
     func encode(_ value: some Encodable) throws {
         let attribute = try box(value)
-        self.encode(attribute)
+        self.encode(attribute: attribute)
     }
 }