diff --git a/build.gradle b/build.gradle
index c69b990..167b254 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ targetCompatibility = 1.8
 
 description = 'Utilities to import diagrams and documentation into a Structurizr workspace'
 group = 'com.structurizr'
-version = '1.2.0'
+version = '1.2.1'
 
 test {
     useJUnitPlatform()
diff --git a/docs/changelog.md b/docs/changelog.md
index 22de528..0598dbf 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.2.1 (18th February 2023)
+
+- Explicitly request PNG format from Mermaid servers.
+
 ## 1.2.0 (16th February 2023)
 
 - __Breaking change__: Renamed artifact from `structurizr-documentation` to `structurizr-import`.
diff --git a/src/main/java/com/structurizr/importer/diagrams/mermaid/MermaidImporter.java b/src/main/java/com/structurizr/importer/diagrams/mermaid/MermaidImporter.java
index 5d17c0f..e22206f 100644
--- a/src/main/java/com/structurizr/importer/diagrams/mermaid/MermaidImporter.java
+++ b/src/main/java/com/structurizr/importer/diagrams/mermaid/MermaidImporter.java
@@ -26,7 +26,7 @@ public void importDiagram(ImageView view, String content) {
         }
 
         String encodedMermaid = new MermaidEncoder().encode(content);
-        String url = String.format("%s/img/%s", mermaidServer, encodedMermaid);
+        String url = String.format("%s/img/%s?type=png", mermaidServer, encodedMermaid);
         view.setContent(url);
         view.setContentType(CONTENT_TYPE_IMAGE_PNG);
     }
diff --git a/src/test/java/com/structurizr/importer/diagrams/mermaid/MermaidImporterTests.java b/src/test/java/com/structurizr/importer/diagrams/mermaid/MermaidImporterTests.java
index 0c93c48..fa55dea 100644
--- a/src/test/java/com/structurizr/importer/diagrams/mermaid/MermaidImporterTests.java
+++ b/src/test/java/com/structurizr/importer/diagrams/mermaid/MermaidImporterTests.java
@@ -21,7 +21,7 @@ public void test_import() throws Exception {
         assertNull(view.getElement());
         assertNull(view.getElementId());
         assertEquals("flowchart.mmd", view.getTitle());
-        assertEquals("https://mermaid.ink/img/eyAiY29kZSI6ImZsb3djaGFydCBURFxuICAgIFN0YXJ0IC0tPiBTdG9wIiwgIm1lcm1haWQiOnsidGhlbWUiOiJkZWZhdWx0In19", view.getContent());
+        assertEquals("https://mermaid.ink/img/eyAiY29kZSI6ImZsb3djaGFydCBURFxuICAgIFN0YXJ0IC0tPiBTdG9wIiwgIm1lcm1haWQiOnsidGhlbWUiOiJkZWZhdWx0In19?type=png", view.getContent());
     }
 
     @Test