diff --git a/benchmarks/bench/UnescapePureText1.hs b/benchmarks/bench/UnescapePureText1.hs
index 9def9a1c..a0f55ac9 100644
--- a/benchmarks/bench/UnescapePureText1.hs
+++ b/benchmarks/bench/UnescapePureText1.hs
@@ -2,7 +2,7 @@
 --
 -- WARNING: This file is security sensitive as it uses unsafeWrite which does
 -- not check bounds. Any changes should be made with care and we would love to
--- get informed about them, just cc us in any PR targetting this file: @eskimor @jprider63
+-- get informed about them, just cc us in any PR targeting this file: @eskimor @jprider63
 -- We would be happy to review the changes!
 
 -- The security check at the end (pos > length) only works if pos grows
diff --git a/benchmarks/bench/UnescapePureText2.hs b/benchmarks/bench/UnescapePureText2.hs
index 0bb4d9eb..5c5766f8 100644
--- a/benchmarks/bench/UnescapePureText2.hs
+++ b/benchmarks/bench/UnescapePureText2.hs
@@ -3,7 +3,7 @@
 --
 -- WARNING: This file is security sensitive as it uses unsafeWrite which does
 -- not check bounds. Any changes should be made with care and we would love to
--- get informed about them, just cc us in any PR targetting this file: @eskimor @jprider63
+-- get informed about them, just cc us in any PR targeting this file: @eskimor @jprider63
 -- We would be happy to review the changes!
 
 -- The security check at the end (pos > length) only works if pos grows
diff --git a/changelog.md b/changelog.md
index c223a87f..2863c933 100644
--- a/changelog.md
+++ b/changelog.md
@@ -30,7 +30,7 @@ For the latest version of this document, please see [https://github.com/haskell/
   One gotcha is that internal `Text` values (in `Key`s or `Value` `String`s)
   will most likely retain the original input `Text` value (its underlying `Array`).
   It shouldn't be an issue if the `Value` is then decoded to something else so these
-  `Text` values disapper, but if not (e.g. `Object` keys survive)
+  `Text` values disappear, but if not (e.g. `Object` keys survive)
   then users might want to use `Data.Text.copy`.
 
 ### 2.2.0.0
@@ -50,7 +50,7 @@ For the latest version of this document, please see [https://github.com/haskell/
 
   In addition to `Maybe` (and `Option`) fields the `Data.Monoid.First` and `Data.Monoid.Last` are also omitted,
   as well as the most newtype wrappers, when their wrap omittable type (e.g. newtypes in `Data.Monoid` and `Data.Semigroup`, `Identity`, `Const`, `Tagged`, `Compose`).
-  Additionall "boring" types like `()` and `Proxy` are omitted as well.
+  Additional "boring" types like `()` and `Proxy` are omitted as well.
   As the omitting is now uniform, type arguments are also omitted (also in `Generic1` derived instance).
 
   Resolves issues:
@@ -68,7 +68,7 @@ For the latest version of this document, please see [https://github.com/haskell/
 * Move `Data.Aeson.Parser` module into separate [`attoparsec-aeson`](https://hackage.haskell.org/package/attoparsec-aeson) package, as these parsers are not used by `aeson` itself anymore.
 * Use [`text-iso8601`](https://hackage.haskell.org/package/text-iso8601) package for parsing `time` types. These are slightly faster than previously used (copy of) `attoparsec-iso8601`.
   Formats accepted is slightly changed:
-  - The space between time and timezone offset (in `UTCTime` and `ZonedTime`) is disallowed. ISO8601 explictly forbidds it.
+  - The space between time and timezone offset (in `UTCTime` and `ZonedTime`) is disallowed. ISO8601 explicitly forbidds it.
   - The timezone offsets can be in range -23:59..23:59. This is how Python, joda-time etc seems to do. (Previously the range was -12..+14)
 
 * Remove internal `Data.Aeson.Internal` and `Data.Aeson.Internal.Time` modules. Everything from the former is exported elsewhere (`Data.Aeson.Types`), the latter was truly internal.
@@ -231,7 +231,7 @@ instance FromJSON Foo where
   parseJSON = gParseJSON defaultOptions { rejectUnknownFields = True }
 ```
 
-* `FromJSON` instance of `Ratio a` now parses numbers in addtion to
+* `FromJSON` instance of `Ratio a` now parses numbers in addition to
   standard `{numerator=..., denumerator=...}` encoding. Thanks to
   Aleksey Khudyakov.
 
diff --git a/src/Data/Aeson/Decoding.hs b/src/Data/Aeson/Decoding.hs
index 6ded5723..d9f4a466 100644
--- a/src/Data/Aeson/Decoding.hs
+++ b/src/Data/Aeson/Decoding.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE RankNTypes          #-}
 {-# LANGUAGE ScopedTypeVariables #-}
--- | Convertion to and from @aeson@ 'A.Value'.
--- 
+-- | Conversion to and from @aeson@ 'A.Value'.
+--
 module Data.Aeson.Decoding (
     decode,
     eitherDecode,
diff --git a/src/Data/Aeson/Decoding/Conversion.hs b/src/Data/Aeson/Decoding/Conversion.hs
index ff256fdf..0d9b58e3 100644
--- a/src/Data/Aeson/Decoding/Conversion.hs
+++ b/src/Data/Aeson/Decoding/Conversion.hs
@@ -87,7 +87,7 @@ convertR tkr err kont = goR [] tkr err $ kont . KM.fromList where
         -> (e -> r)
         -> ([(Key, A.Value)] -> k -> r)
         -> r
-    -- here we don't stricly need bang on !v as KM is a Strict (in values) map.
+    -- here we don't strictly need bang on !v as KM is a Strict (in values) map.
     -- but we force the value sooner.
     goR !acc (TkPair t toks) g f = convert toks g $ \ !v k -> goR ((t , v) : acc) k g f
     goR !acc (TkRecordEnd k) _ f = f acc k
diff --git a/src/Data/Aeson/TH.hs b/src/Data/Aeson/TH.hs
index beaffc58..b4f3636a 100644
--- a/src/Data/Aeson/TH.hs
+++ b/src/Data/Aeson/TH.hs
@@ -955,7 +955,7 @@ parseRecord jc tvMap argTys opts tName conName fields obj inTaggedObject =
              | (field, argTy) <- zip fields argTys
              ]
 
--- A hack, as I'm too lazy to changge code to not assume fields are non empty.
+-- A hack, as I'm too lazy to change code to not assume fields are non empty.
 nonEmpty :: [a] -> (a, [a])
 nonEmpty (x:xs) = (x,xs)
 nonEmpty []     = error "unexpected empty list"
@@ -1276,7 +1276,7 @@ dispatchFunByType _ jf _ tvMap list (VarT tyName) =
     varE $ case M.lookup tyName tvMap of
                 Just (tfjoExp, tfjExp, tfjlExp) -> case list of
                     Omit -> tfjoExp
-                    Single -> tfjExp 
+                    Single -> tfjExp
                     Plural -> tfjlExp
                 Nothing                   -> jsonFunValOrListName list jf Arity0
 dispatchFunByType jc jf conName tvMap list (SigT ty _) =
diff --git a/tests/DoubleToScientific.hs b/tests/DoubleToScientific.hs
index b50d1b9a..dc05b601 100644
--- a/tests/DoubleToScientific.hs
+++ b/tests/DoubleToScientific.hs
@@ -114,7 +114,7 @@ initialStartValues v = lowerBoundaryCloser' $ applyExponent e S
     (s, e, lower_boundary_is_closer) = decodeFloat' v
     lowerBoundaryCloser' = if lower_boundary_is_closer then lowerBoundaryCloser else id
 
--- | return significant, exponent and whether lower boundery is closer.
+-- | return significand, exponent and whether lower boundary is closer.
 --
 -- GHC's decodeFloat does "weird" stuff to denormal doubles,
 -- that messes up our delta calculation.
diff --git a/tests/UnitTests.hs b/tests/UnitTests.hs
index c9dda427..91bc0245 100644
--- a/tests/UnitTests.hs
+++ b/tests/UnitTests.hs
@@ -87,7 +87,8 @@ camelFrom c s = case split c s of
   _    -> s -- shouldn't happen?
   where
     split c' s' = map L.unpack $ L.split c' $ L.pack s'
-    capitalize t = toUpper (head t) : tail t
+    capitalize []     = []
+    capitalize (x:xs) = toUpper x : xs
 
 
 data Wibble = Wibble {