diff --git a/pom.xml b/pom.xml
index 74c1eeb..f43ebc2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
     </parent>
 
     <artifactId>kemitix-trello</artifactId>
-    <version>1.0.1</version>
+    <version>1.0.2</version>
 
     <properties>
         <tiles-maven-plugin.version>2.18</tiles-maven-plugin.version>
diff --git a/src/main/java/net/kemitix/trello/TrelloAttachment.java b/src/main/java/net/kemitix/trello/TrelloAttachment.java
index 1a2bfcd..d214b77 100644
--- a/src/main/java/net/kemitix/trello/TrelloAttachment.java
+++ b/src/main/java/net/kemitix/trello/TrelloAttachment.java
@@ -9,6 +9,7 @@ import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URL;
 import java.nio.channels.Channels;
+import java.util.Optional;
 import java.util.logging.Logger;
 
 public class TrelloAttachment implements Attachment {
@@ -17,7 +18,6 @@ public class TrelloAttachment implements Attachment {
             Logger.getLogger(
                     TrelloAttachment.class.getName());
 
-    private static final String[] EXTENSIONS = new String[]{"doc", "docx", "odt"};
     private final com.julienvey.trello.domain.Attachment attachment;
     private final Card card;
     private final AttachmentDirectory attachmentDirectory;
@@ -51,12 +51,10 @@ public class TrelloAttachment implements Attachment {
     private String extension() {
         URI uri = URI.create(attachment.getUrl());
         String path = uri.getPath();
-        for (String ex : EXTENSIONS) {
-            if (path.endsWith("." + ex)) {
-                return ex;
-            }
-        }
-        return "";
+        return Optional.ofNullable(path)
+                .filter(f -> f.contains("."))
+                .map(f -> f.substring(path.lastIndexOf(".") + 1))
+                .orElse("");
     }
 
     @Override
diff --git a/src/test/java/net/kemitix/trello/TrelloAttachmentTest.java b/src/test/java/net/kemitix/trello/TrelloAttachmentTest.java
new file mode 100644
index 0000000..48497db
--- /dev/null
+++ b/src/test/java/net/kemitix/trello/TrelloAttachmentTest.java
@@ -0,0 +1,30 @@
+package net.kemitix.trello;
+
+import com.julienvey.trello.domain.Attachment;
+import com.julienvey.trello.domain.Card;
+import org.assertj.core.api.WithAssertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+
+public class TrelloAttachmentTest
+        implements WithAssertions {
+
+    @Test
+    void regressionExtensionTruncated() {
+        //given
+        Attachment attachment = new Attachment();
+        attachment.setUrl("card-url.extension");
+        Card card = new Card();
+        card.setIdShort("123");
+        card.setName("card-name");
+        AttachmentDirectory dir = new AttachmentDirectoryImpl();
+        var trelloAttachment = TrelloAttachment.create(
+                attachment, card, dir
+        );
+        //when
+        File filename = trelloAttachment.getFilename();
+        //then
+        assertThat(filename.getName()).endsWith(".extension");
+    }
+}