diff --git a/README-CHANGES.xml b/README-CHANGES.xml
index 10e5ee5..c5c4bfa 100644
--- a/README-CHANGES.xml
+++ b/README-CHANGES.xml
@@ -40,7 +40,7 @@
         <c:change date="2024-09-25T00:00:00+00:00" summary="Add release signing for F-Droid."/>
       </c:changes>
     </c:release>
-    <c:release date="2024-10-08T20:34:27+00:00" is-open="true" ticket-system="com.github.io7m.exfilac" version="1.1.0">
+    <c:release date="2024-10-08T21:04:03+00:00" is-open="true" ticket-system="com.github.io7m.exfilac" version="1.1.0">
       <c:changes>
         <c:change date="2024-10-08T00:00:00+00:00" summary="Fix status screen text on small screens.">
           <c:tickets>
@@ -57,11 +57,12 @@
             <c:ticket id="16"/>
           </c:tickets>
         </c:change>
-        <c:change date="2024-10-08T20:34:27+00:00" summary="Add more upload schedules.">
+        <c:change date="2024-10-08T00:00:00+00:00" summary="Add more upload schedules.">
           <c:tickets>
             <c:ticket id="19"/>
           </c:tickets>
         </c:change>
+        <c:change date="2024-10-08T21:04:03+00:00" summary="Allow for more prompt cancellation behaviour."/>
       </c:changes>
     </c:release>
   </c:releases>
diff --git a/com.io7m.exfilac.core/src/main/java/com/io7m/exfilac/core/internal/uploads/EFUploadTask.kt b/com.io7m.exfilac.core/src/main/java/com/io7m/exfilac/core/internal/uploads/EFUploadTask.kt
index 20f5a45..f9a76ea 100644
--- a/com.io7m.exfilac.core/src/main/java/com/io7m/exfilac/core/internal/uploads/EFUploadTask.kt
+++ b/com.io7m.exfilac.core/src/main/java/com/io7m/exfilac/core/internal/uploads/EFUploadTask.kt
@@ -53,6 +53,7 @@ import com.io7m.exfilac.core.internal.database.EFQUploadRecordCreateType
 import com.io7m.exfilac.core.internal.database.EFQUploadRecordUpdateType
 import com.io7m.exfilac.s3_uploader.api.EFS3TransferStatistics
 import com.io7m.exfilac.s3_uploader.api.EFS3UploadRequest
+import com.io7m.exfilac.s3_uploader.api.EFS3UploadType
 import com.io7m.exfilac.s3_uploader.api.EFS3UploaderType
 import com.io7m.jattribute.core.AttributeType
 import com.io7m.taskrecorder.core.TRNoResult
@@ -82,6 +83,7 @@ class EFUploadTask(
   val clock: EFClockServiceType,
 ) {
 
+  private var s3Upload: EFS3UploadType? = null
   private val uploadRecord: AtomicReference<EFUploadRecord> = AtomicReference()
   private var bucketConfiguration: EFBucketConfiguration? = null
   private var uploadConfiguration: EFUploadConfiguration? = null
@@ -111,6 +113,12 @@ class EFUploadTask(
     } catch (e: Throwable) {
       this.setFailed(e)
       throw e
+    } finally {
+      try {
+        this.s3Upload?.close()
+      } catch (e: Throwable) {
+        this.logger.debug("Failed to close upload: ", e)
+      }
     }
   }
 
@@ -233,7 +241,8 @@ class EFUploadTask(
           }
         )
 
-      this.s3Uploader.create(uploadInfo, this.clock).use { upload -> upload.execute() }
+      this.s3Upload = this.s3Uploader.create(uploadInfo, this.clock)
+      this.s3Upload?.execute()
       step.setStepSucceeded("OK")
     } catch (e: Throwable) {
       step.setStepFailed(this.exceptionMessage(e), e)
@@ -579,6 +588,13 @@ class EFUploadTask(
 
   fun cancel() {
     this.cancelled.set(true)
+
+    try {
+      this.s3Upload?.close()
+    } catch (e: Throwable) {
+      this.logger.debug("Failed to close upload: ", e)
+    }
+
     this.onStatusChanged(EFUploadStatusCancelling(this.name, id = this.uploadRecord.get()?.id))
     this.statusChangedSource.set(EFUploadStatusChanged())
   }
diff --git a/com.io7m.exfilac.s3_uploader.amazon/build.gradle.kts b/com.io7m.exfilac.s3_uploader.amazon/build.gradle.kts
index 62734a1..fedb5e5 100644
--- a/com.io7m.exfilac.s3_uploader.amazon/build.gradle.kts
+++ b/com.io7m.exfilac.s3_uploader.amazon/build.gradle.kts
@@ -5,6 +5,7 @@ dependencies {
 
   implementation(libs.apache.commons.io)
   implementation(libs.apache.commons.math3)
+  implementation(libs.io7m.jmulticlose.core)
   implementation(libs.io7m.peixoto.sdk)
   implementation(libs.kotlin.stdlib)
   implementation(libs.slf4j)
diff --git a/com.io7m.exfilac.s3_uploader.amazon/src/main/java/com/io7m/exfilac/s3_uploader/amazon/EFS3AMZUpload.kt b/com.io7m.exfilac.s3_uploader.amazon/src/main/java/com/io7m/exfilac/s3_uploader/amazon/EFS3AMZUpload.kt
index 5a4ddc3..22b2035 100644
--- a/com.io7m.exfilac.s3_uploader.amazon/src/main/java/com/io7m/exfilac/s3_uploader/amazon/EFS3AMZUpload.kt
+++ b/com.io7m.exfilac.s3_uploader.amazon/src/main/java/com/io7m/exfilac/s3_uploader/amazon/EFS3AMZUpload.kt
@@ -20,11 +20,13 @@ import com.io7m.exfilac.clock.api.EFClockServiceType
 import com.io7m.exfilac.s3_uploader.api.EFS3TransferStatistics
 import com.io7m.exfilac.s3_uploader.api.EFS3UploadRequest
 import com.io7m.exfilac.s3_uploader.api.EFS3UploadType
+import com.io7m.jmulticlose.core.CloseableCollection
 import com.io7m.peixoto.sdk.org.apache.commons.codec.binary.Base64
 import com.io7m.peixoto.sdk.software.amazon.awssdk.auth.credentials.AwsBasicCredentials
 import com.io7m.peixoto.sdk.software.amazon.awssdk.auth.credentials.StaticCredentialsProvider
 import com.io7m.peixoto.sdk.software.amazon.awssdk.awscore.retry.AwsRetryStrategy
 import com.io7m.peixoto.sdk.software.amazon.awssdk.core.sync.RequestBody
+import com.io7m.peixoto.sdk.software.amazon.awssdk.http.SdkHttpClient
 import com.io7m.peixoto.sdk.software.amazon.awssdk.http.apache.ApacheHttpClient
 import com.io7m.peixoto.sdk.software.amazon.awssdk.regions.Region
 import com.io7m.peixoto.sdk.software.amazon.awssdk.services.s3.S3Client
@@ -40,6 +42,7 @@ import com.io7m.peixoto.sdk.software.amazon.awssdk.services.s3.model.UploadPartR
 import org.apache.commons.io.input.BoundedInputStream
 import org.slf4j.LoggerFactory
 import java.security.MessageDigest
+import java.time.Duration
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
 import java.util.concurrent.TimeUnit
@@ -50,6 +53,7 @@ class EFS3AMZUpload(
   private val upload: EFS3UploadRequest,
   private val clock: EFClockServiceType,
 ) : EFS3UploadType {
+
   private val logger =
     LoggerFactory.getLogger(EFS3AMZUpload::class.java)
 
@@ -60,7 +64,12 @@ class EFS3AMZUpload(
   private val minimumChunkSize =
     8_388_608L
 
+  private val resources =
+    CloseableCollection.create()
+
   private lateinit var executor: ExecutorService
+  private lateinit var httpClient: SdkHttpClient
+  private lateinit var s3client: S3Client
 
   private val done =
     AtomicBoolean()
@@ -79,6 +88,8 @@ class EFS3AMZUpload(
         thread
       }
 
+    this.resources.add(AutoCloseable { this.executor.shutdown() })
+
     try {
       this.executor.execute(this::executeStreamSupervisor)
 
@@ -87,13 +98,17 @@ class EFS3AMZUpload(
           AwsBasicCredentials.create(this.upload.accessKey, this.upload.secretKey)
         )
 
-      val httpClient =
-        ApacheHttpClient.builder()
-          .build()
+      this.httpClient =
+        this.resources.add(
+          ApacheHttpClient.builder()
+            .connectionTimeout(Duration.ofSeconds(10L))
+            .socketTimeout(Duration.ofSeconds(10L))
+            .build()
+        )
 
       val clientBuilder = S3Client.builder()
       clientBuilder.credentialsProvider(credentials)
-      clientBuilder.httpClient(httpClient)
+      clientBuilder.httpClient(this.httpClient)
       clientBuilder.region(Region.of(this.upload.region))
       clientBuilder.region(Region.of(this.upload.region))
       clientBuilder.forcePathStyle(this.upload.pathStyle)
@@ -102,12 +117,13 @@ class EFS3AMZUpload(
       val strategy =
         AwsRetryStrategy.standardRetryStrategy()
           .toBuilder()
-          .maxAttempts(10)
+          .maxAttempts(5)
           .build()
 
       clientBuilder.overrideConfiguration { o -> o.retryStrategy(strategy) }
 
       return clientBuilder.build().use { c ->
+        this.s3client = this.resources.add(c)
         if (this.upload.size >= this.multipartThreshold) {
           this.executeUploadMultiPart(c)
         } else {
@@ -382,5 +398,11 @@ class EFS3AMZUpload(
 
   override fun close() {
     this.done.set(true)
+
+    try {
+      this.resources.close()
+    } catch (e: Throwable) {
+      this.logger.debug("Failed to close S3 client: ", e)
+    }
   }
 }