diff --git a/src/main/java/de/mattv/fileserver/data/Node.java b/src/main/java/de/mattv/fileserver/data/Node.java
index 7418e07..7831b5a 100644
--- a/src/main/java/de/mattv/fileserver/data/Node.java
+++ b/src/main/java/de/mattv/fileserver/data/Node.java
@@ -49,8 +49,9 @@ public class Node {
                     .allowOverwrite(true)
                     .outputFormat("png")
                     .toFile(previewFile);
-        } catch (UnsupportedFormatException ignored) {}
-
-        hasPreview = true;
+            hasPreview = true;
+        } catch (UnsupportedFormatException | IllegalStateException ignored) {
+            hasPreview = false;
+        }
     }
 }