diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fc36ef7..95886f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [3.5, 3.6, 3.7, 3.8]
+        python: [3.6, 3.7, 3.8, 3.9]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/uhu/core/compression.py b/uhu/core/compression.py
index 54ab0e8..76c0256 100644
--- a/uhu/core/compression.py
+++ b/uhu/core/compression.py
@@ -28,6 +28,14 @@
         'test': 'xz -t %s',
         'cmd': "xz -l %s --robot | tail -n 1 | awk '{ print $5}'"
     },
+    # LZMA format: http://tukaani.org/xz/xz-file-format.txt
+    'lzma': {
+        'signature': b'\x5d\x00\x00',
+        'test': 'xz -t --format=lzma %s',
+        # Since lzma compression doen't add uncompressed size
+        # information to the header to set the field to 0
+        'cmd': "ls %s | echo 0"
+    },
 }