diff --git a/build.gradle.kts b/build.gradle.kts
index 3167bb1..3ff45d1 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
     id("io.micronaut.application") version "2.0.2"
 }
 
-version = "1.0.1"
+version = "1.0.2"
 group = "com.jsonblob"
 
 val kotlinVersion= project.properties["kotlinVersion"]
diff --git a/src/main/kotlin/jsonblob/api/http/ApiController.kt b/src/main/kotlin/jsonblob/api/http/ApiController.kt
index afd17e8..d0586aa 100644
--- a/src/main/kotlin/jsonblob/api/http/ApiController.kt
+++ b/src/main/kotlin/jsonblob/api/http/ApiController.kt
@@ -157,7 +157,7 @@ class ApiController(
         return false
     }
 
-    private fun delete(blobId: String) = jsonBlobStore.remove(blobId)
+    private fun delete(blobId: String) = jsonBlobStore.exists(blobId) && jsonBlobStore.remove(blobId)
 
     private fun updateFirstBlobFromPath(path: String, json: String): JsonBlob? {
         val ids = blobIdsFromPath(path)
@@ -169,17 +169,21 @@ class ApiController(
     }
 
     private fun update(blobId: String, json: String): JsonBlob? {
-        val resolver = idResolvers.firstOrNull { it.handles(blobId) }
-        return if (resolver != null) {
-            val created = resolver.resolveTimestamp(blobId)
-            val jsonBlob = JsonBlob(
-                id = blobId,
-                json = json,
-                created = created
-            )
-            jsonBlobStore.write(jsonBlob)
+        if (JsonCleaner.validJson(json)) {
+            val resolver = idResolvers.firstOrNull { it.handles(blobId) }
+            return if (resolver != null) {
+                val created = resolver.resolveTimestamp(blobId)
+                val jsonBlob = JsonBlob(
+                    id = blobId,
+                    json = json,
+                    created = created
+                )
+                jsonBlobStore.write(jsonBlob)
+            } else {
+                null
+            }
         } else {
-            null
+            throw HttpStatusException(HttpStatus.BAD_REQUEST, "Invalid JSON")
         }
     }
 
diff --git a/src/main/kotlin/jsonblob/core/store/JsonBlobStore.kt b/src/main/kotlin/jsonblob/core/store/JsonBlobStore.kt
index 13c7fe2..2f1573f 100644
--- a/src/main/kotlin/jsonblob/core/store/JsonBlobStore.kt
+++ b/src/main/kotlin/jsonblob/core/store/JsonBlobStore.kt
@@ -32,7 +32,7 @@ abstract class JsonBlobStore(
                 created = created
             )
         }.onFailure {
-            log.warn { "Couldn't read JsonBlob with id=$id " }
+            log.debug { "Couldn't read JsonBlob with id=$id " }
         }.getOrNull()
     }
 
diff --git a/src/main/kotlin/jsonblob/core/store/file/FileSystemJsonBlobStore.kt b/src/main/kotlin/jsonblob/core/store/file/FileSystemJsonBlobStore.kt
index e0a615d..5e80f6d 100644
--- a/src/main/kotlin/jsonblob/core/store/file/FileSystemJsonBlobStore.kt
+++ b/src/main/kotlin/jsonblob/core/store/file/FileSystemJsonBlobStore.kt
@@ -58,7 +58,7 @@ open class FileSystemJsonBlobStore(
                 lock.unlock()
             }
         }.onFailure {
-            log.warn { "Couldn't retrieve JsonBlob with id=$id " }
+            log.debug { "Couldn't retrieve JsonBlob with id=$id " }
         }.getOrNull()
     }
 
diff --git a/src/main/resources/views/editor.hbs b/src/main/resources/views/editor.hbs
index dc0ea84..07a44a7 100644
--- a/src/main/resources/views/editor.hbs
+++ b/src/main/resources/views/editor.hbs
@@ -289,7 +289,6 @@
     <script type="text/javascript">
     {{#if blobId}}
         var blobId = "{{blobId}}";
-        ga('send', 'event', "Blobs", "load", blobId);
     {{else}}
         var blobId = null;
     {{/if}}
@@ -322,11 +321,6 @@
             app.codeEditor.resize();
         }
         $('#tour').click(function() {
-            if (blobId) {
-                ga('send', 'event', "Tour", "start", blobId);
-            } else {
-                ga('send', 'event', "Tour", "start");
-            }
             $('#tourContent').joyride({
                 autoStart: true,
                 expose: true,
@@ -335,21 +329,7 @@
                 tipAnimationFadeSpeed: 300,
                 cookieMonster: true,
                 cookieName: 'jsonblobTour',
-                cookieDomain: true,
-                postRideCallback: function () {
-                    if (blobId) {
-                        ga('send', 'event', "Tour", "complete", blobId);
-                    } else {
-                        ga('send', 'event', "Tour", "complete");
-                    }
-                },
-                'postStepCallback': function (index, tip) {
-                    if (blobId) {
-                        ga('send', 'event', "Tour", "step", blobId, index);
-                    } else {
-                        ga('send', 'event', "Tour", "step", null, index);
-                    }
-                }
+                cookieDomain: true
             });
         });
         $(document).ready(function() {
@@ -365,11 +345,6 @@
             }
         });
         $("#createGist").click(function() {
-            if (blobId) {
-                ga('send', 'event', "Blobs", "gist", blobId);
-            } else {
-                ga('send', 'event', "Blobs", "gist");
-            }
             var gist = {
                 "description": "JSON Blob from " + document.URL,
                 "public": false,
@@ -394,11 +369,6 @@
             });
         });
         $("#clear").click(function() {
-            if (blobId) {
-                ga('send', 'event', "Blobs", "clear", blobId);
-            } else {
-                ga('send', 'event', "Blobs", "clear");
-            }
             app.codeEditor.set({});
             app.treeEditor.set({});
             blobId = null;
@@ -419,11 +389,6 @@
                 alert("Please enter a URL for the request to be sent to!");
                 return false;
             }
-            if (blobId) {
-                ga('send', 'event', "Blobs", "makeRequest", blobId);
-            } else {
-                ga('send', 'event', "Blobs", "makeRequest");
-            }
             var method = $(this).text();
             var headers = {};
             $(".requestHeader").each(function() {
@@ -455,7 +420,6 @@
                     }
                     $('#makeRequestModal').modal('hide');
                     $('#makeRequestSuccess').modal('show');
-                    ga('send', 'event', "Blobs", "makeRequestSuccess");
                 },
                 error: function(jqXHR, textStatus, errorThrown) {
                     if (errorThrown) {
@@ -470,7 +434,6 @@
                     $(".requestedUrl").text($("#requestUrl").val());
                     $("#makeRequestModal").modal('hide');
                     $("#makeRequestFailure").modal('show');
-                    ga('send', 'event', "Blobs", "makeRequestFailure");
                 },
                 cache: false
             };
@@ -490,11 +453,6 @@
         $("#save").click(function() {
             var jsonString = app.codeEditor == app.lastChanged ? app.codeEditor.getText() : app.treeEditor.getText();
             var valid = !isValidJson(jsonString);
-            if (blobId) {
-                ga('send', 'event', "Blobs", "save", blobId, valid ? 1 : 0);
-            } else {
-                ga('send', 'event', "Blobs", "save", null, valid ? 1 : 0);
-            }
             if (valid) {
                 $('#invalidJson').modal('show');
                 return;
diff --git a/src/main/resources/views/ga.hbs b/src/main/resources/views/ga.hbs
index 73292a8..f752d54 100644
--- a/src/main/resources/views/ga.hbs
+++ b/src/main/resources/views/ga.hbs
@@ -1,9 +1,9 @@
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id={{gaWebPropertyID}}"></script>
 <script>
-    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-    ga('create', '{{gaWebPropertyID}}', 'auto');
-    ga('require', 'displayfeatures');
-    ga('send', 'pageview');
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', '{{gaWebPropertyID}}');
 </script>
\ No newline at end of file
diff --git a/src/test/kotlin/jsonblob/api/http/ApiTest.kt b/src/test/kotlin/jsonblob/api/http/ApiTest.kt
index ed8e173..e5a0739 100644
--- a/src/test/kotlin/jsonblob/api/http/ApiTest.kt
+++ b/src/test/kotlin/jsonblob/api/http/ApiTest.kt
@@ -8,23 +8,20 @@ import io.micronaut.http.HttpResponse
 import io.micronaut.http.MediaType
 import io.micronaut.http.client.HttpClient
 import io.micronaut.http.client.annotation.Client
+import io.micronaut.http.client.exceptions.HttpClientResponseException
 import io.micronaut.test.extensions.junit5.annotation.MicronautTest
 import io.micronaut.test.support.TestPropertyProvider
-import jsonblob.config.S3ClientBuilderListener
 import jsonblob.core.compression.compressor.GZIPBlobCompressor
 import jsonblob.core.id.Type1UUIDJsonBlobHandler
 import jsonblob.core.store.JsonBlobStore
 import mu.KotlinLogging
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.jupiter.api.AfterAll
-import org.junit.jupiter.api.BeforeAll
+import org.assertj.core.api.Assertions.assertThatThrownBy
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
 import org.skyscreamer.jsonassert.JSONAssert.assertEquals
-import org.testcontainers.containers.localstack.LocalStackContainer
 import org.testcontainers.shaded.com.google.common.io.Files
-import org.testcontainers.utility.DockerImageName
-import software.amazon.awssdk.services.s3.S3Client
+import java.util.UUID
 import javax.inject.Inject
 
 
@@ -129,6 +126,24 @@ class ApiTest: TestPropertyProvider {
         }
     }
 
+    @Test
+    fun `blob is created on API PUT`() {
+        val resp = client
+            .toBlocking()
+            .exchange(PUT("/api/jsonBlob/${type1UUIDJsonBlobHandler.generate()}", json).contentType(MediaType.APPLICATION_JSON_TYPE), String::class.java)
+        assertThat(resp.code()).isEqualTo(200)
+    }
+
+    @Test
+    fun `blob is not created on bad API PUT`() {
+        assertThatThrownBy {
+            client
+                .toBlocking()
+                .exchange(PUT("/api/jsonBlob/${UUID.randomUUID()}", json).contentType(MediaType.APPLICATION_JSON_TYPE), String::class.java)
+
+        }.isInstanceOf(HttpClientResponseException::class.java)
+    }
+
     @Test
     fun `blob is updated on custom API PUT`() {
         validateUpdate {