diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -5,6 +5,12 @@
 ## Unreleased changes
 
 
+## Version 0.9.0.0
+
+-   Toolchain update
+-   Update to random version 1.3
+
+
 ## Version 0.8.0.0
 
 -   Adapt to breaking changes in upstream libraries (`data-default`).
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # The ELynx Suite
 
-Version: 0.8.0.0.
+Version: 0.9.0.0.
 Reproducible evolution made easy.
 
 <p align="center"><img src="https://travis-ci.org/dschrempf/elynx.svg?branch=master"/></p>
@@ -73,9 +73,9 @@
     # OR: stack exec slynx -- --help
     # OR: slynx --help
 
-    ELynx Suite version 0.8.0.0.
+    ELynx Suite version 0.9.0.0.
     Developed by Dominik Schrempf.
-    Compiled on October 27, 2024, at 07:14 am, UTC.
+    Compiled on August 11, 2025, at 07:19 am, UTC.
     
     Usage: slynx [-v|--verbosity VALUE] [-o|--output-file-basename NAME]
                  [-f|--force] [--no-elynx-file] COMMAND
@@ -143,9 +143,9 @@
     # OR: stack exec slynx -- simulate --help
     # OR: slynx simulate --help
 
-    ELynx Suite version 0.8.0.0.
+    ELynx Suite version 0.9.0.0.
     Developed by Dominik Schrempf.
-    Compiled on October 27, 2024, at 07:14 am, UTC.
+    Compiled on August 11, 2025, at 07:19 am, UTC.
     
     Usage: slynx simulate (-t|--tree-file Name) [-s|--substitution-model MODEL]
                           [-m|--mixture-model MODEL] [-n|--global-normalization]
diff --git a/src/TLynx/Compare/Compare.hs b/src/TLynx/Compare/Compare.hs
--- a/src/TLynx/Compare/Compare.hs
+++ b/src/TLynx/Compare/Compare.hs
@@ -234,7 +234,7 @@
             Just fn -> do
               let compareCommonBps =
                     [ (bpToBrLen1 M.! b, bpToBrLen2 M.! b)
-                      | b <- S.toList bpCommon
+                    | b <- S.toList bpCommon
                     ]
               liftIO $ epspdfPlot fn (plotBps compareCommonBps)
               logInfoS
diff --git a/src/TLynx/Distance/Distance.hs b/src/TLynx/Distance/Distance.hs
--- a/src/TLynx/Distance/Distance.hs
+++ b/src/TLynx/Distance/Distance.hs
@@ -77,8 +77,8 @@
   [(Int, Int, b)]
 pairwise dist trs =
   [ (i, j, dist x y)
-    | (i : is, x : xs) <- zip (tails [0 ..]) (tails trs),
-      (j, y) <- zip is xs
+  | (i : is, x : xs) <- zip (tails [0 ..]) (tails trs),
+    (j, y) <- zip is xs
   ]
 
 -- | Compute distance functions between phylogenetic trees.
diff --git a/src/TLynx/Shuffle/Shuffle.hs b/src/TLynx/Shuffle/Shuffle.hs
--- a/src/TLynx/Shuffle/Shuffle.hs
+++ b/src/TLynx/Shuffle/Shuffle.hs
@@ -88,5 +88,5 @@
   lss <- grabble ls n (length ls) gen
   return
     [ toReconstructedTree "" (PointProcess names times o)
-      | (times, names) <- zip css lss
+    | (times, names) <- zip css lss
     ]
diff --git a/tlynx.cabal b/tlynx.cabal
--- a/tlynx.cabal
+++ b/tlynx.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               tlynx
-version:            0.8.0.0
+version:            0.9.0.0
 synopsis:           Handle phylogenetic trees
 description:
   Examine, compare, and simulate phylogenetic trees in a reproducible way. Please see the README on GitHub at <https://github.com/dschrempf/elynx>.