diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac2a02c..4424fad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,8 +25,9 @@ Breaking changes:
 New features:
 - Added `fromKillSignal` (#51 by @JordanMartinez)
 - Added `pidExists` (#53 by @JordanMartinez)
-- Export `toUnsafeChildProcess` (#54 by @JordanMartinez)
+- Export `toUnsafeChildProcess` (#55 by @JordanMartinez)
 - Added `stdio` (#55 by @JordanMartinez)
+- Added `Show` instance to `Shell` & `KillSignal` (#58 by @JordanMartinez)
 
 Other improvements:
 - Fix regression: add `ref`/`unref` APIs that were dropped in `v10.0.0` (#50 by @JordanMartinez)
diff --git a/src/Node/ChildProcess/Types.js b/src/Node/ChildProcess/Types.js
index cad6dce..9a38154 100644
--- a/src/Node/ChildProcess/Types.js
+++ b/src/Node/ChildProcess/Types.js
@@ -1,3 +1,5 @@
+export const showKillSignal = (ks) => ks + "";
+export const showShell = (shell) => shell + "";
 export const fromKillSignalImpl = (left, right, sig) => {
   const ty = typeof sig;
   if (ty === "number") return right(sig | 0);
diff --git a/src/Node/ChildProcess/Types.purs b/src/Node/ChildProcess/Types.purs
index 90c176c..300a60b 100644
--- a/src/Node/ChildProcess/Types.purs
+++ b/src/Node/ChildProcess/Types.purs
@@ -72,6 +72,11 @@ defaultStdIO = unsafeCoerce (null :: Nullable String)
 
 foreign import data KillSignal :: Type
 
+instance Show KillSignal where
+  show = showKillSignal
+
+foreign import showKillSignal :: KillSignal -> String
+
 intSignal :: Int -> KillSignal
 intSignal = unsafeCoerce
 
@@ -85,6 +90,11 @@ foreign import fromKillSignalImpl :: Fn3 (forall l r. l -> Either l r) (forall l
 
 foreign import data Shell :: Type
 
+instance Show Shell where
+  show = showShell
+
+foreign import showShell :: Shell -> String
+
 enableShell :: Shell
 enableShell = unsafeCoerce true