diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index f947179..3854bde 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -13,7 +13,7 @@ jobs:
 
     - uses: haskell-actions/run-fourmolu@v10
       with:
-        version: "0.14.1.0"
+        version: "0.16.2.0"
         pattern: |
           src/**/*.hs
           test/**/*.hs
diff --git a/app/Main.hs b/app/Main.hs
index 5306475..5762e3d 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -2,19 +2,19 @@ module Main (main) where
 
 import Chronos (Time (..), Timespan (..), datetimeToTime, decode_YmdHMS, now, second, w3c)
 import Data.ByteString (StrictByteString)
-import qualified Data.ByteString.Char8 as BSC8
+import Data.ByteString.Char8 qualified as BSC8
 import Data.Maybe (fromJust)
 import Data.Text (Text)
 import Data.Text.Display
-import qualified Data.Text.Encoding as TE
-import qualified Data.Text.IO as TIO
+import Data.Text.Encoding qualified as TE
+import Data.Text.IO qualified as TIO
 import Data.Version (showVersion)
 import Data.Word
 import Options.Applicative
 import Paths_one_time_password (version)
 import Sel (secureMain)
-import qualified Sel.HMAC.SHA256 as SHA256
-import qualified Sel.HMAC.SHA512 as SHA512
+import Sel.HMAC.SHA256 qualified as SHA256
+import Sel.HMAC.SHA512 qualified as SHA512
 import System.Exit (exitFailure)
 import Torsor (scale)
 
diff --git a/fourmolu.yaml b/fourmolu.yaml
index 39acb7d..23e8600 100644
--- a/fourmolu.yaml
+++ b/fourmolu.yaml
@@ -1,11 +1,53 @@
+# Number of spaces per indentation step
 indentation: 2
-comma-style: leading # for lists, tuples etc. - can also be 'leading'
-import-export-style: leading
-record-brace-space: false # rec {x = 1} vs. rec{x = 1}
-indent-wheres: true # 'false' means save space by only half-indenting the 'where' keyword
-respectful: true # don't be too opinionated about newlines etc.
-haddock-style: single-line # '--' vs. '{-'
-newlines-between-decls: 1 # number of newlines between top-level declarations
-fixities: []
+
+# Max line length for automatic line breaking
+column-limit: none
+
+# Styling of arrows in type signatures (choices: trailing, leading, or leading-args)
 function-arrows: leading
+
+# How to place commas in multi-line lists, records, etc. (choices: leading or trailing)
+comma-style: leading
+
+# Styling of import/export lists (choices: leading, trailing, or diff-friendly)
+import-export-style: leading
+
+# Whether to full-indent or half-indent 'where' bindings past the preceding body
+indent-wheres: true
+
+# Whether to leave a space before an opening record brace
+record-brace-space: false
+
+# Number of spaces between top-level declarations
+newlines-between-decls: 1
+
+# How to print Haddock comments (choices: single-line, multi-line, or multi-line-compact)
+haddock-style: single-line
+
+# How to print module docstring
+haddock-style-module: null
+
+# Styling of let blocks (choices: auto, inline, newline, or mixed)
+let-style: auto
+
+# How to align the 'in' keyword with respect to the 'let' keyword (choices: left-align, right-align, or no-space)
+in-style: right-align
+
+# Whether to put parentheses around a single constraint (choices: auto, always, or never)
 single-constraint-parens: never
+
+# Whether to put parentheses around a single deriving class (choices: auto, always, or never)
+single-deriving-parens: always
+
+# Output Unicode syntax (choices: detect, always, or never)
+unicode: never
+
+# Give the programmer more choice on where to insert blank lines
+respectful: true
+
+# Fixity information for operators
+fixities: []
+
+# Module reexports Fourmolu should know about
+reexports: []