diff --git a/Casks/i/insomnium.rb b/Casks/i/insomnium.rb
new file mode 100644
index 0000000000..f741007661
--- /dev/null
+++ b/Casks/i/insomnium.rb
@@ -0,0 +1,24 @@
+cask "insomnium" do
+  version "0.2.3-a"
+  sha256 "3a561fa0d3413d23180d5488b0034a5bbcb2d433e4600e31d002e0ca2a52d9df"
+
+  url "https://github.com/ArchGPT/insomnium/releases/download/core%40#{version}/Insomnium.Core-#{version}.signed.dmg"
+  name "Insomnium"
+  desc "HTTP and GraphQL Client"
+  homepage "https://github.com/ArchGPT/insomnium"
+
+  depends_on macos: ">= :high_sierra"
+
+  app "Insomnium.app"
+
+  zap trash: [
+    "~/Library/Application Support/Insomnium",
+    "~/Library/Caches/com.insomnium.app",
+    "~/Library/Caches/com.insomnium.app.ShipIt",
+    "~/Library/Cookies/com.insomnium.app.binarycookies",
+    "~/Library/Preferences/ByHost/com.insomnium.app.ShipIt.*.plist",
+    "~/Library/Preferences/com.insomnium.app.helper.plist",
+    "~/Library/Preferences/com.insomnium.app.plist",
+    "~/Library/Saved Application State/com.insomnium.app.savedState",
+  ]
+end