diff --git a/README.md b/README.md
index 8a0f0b9..4958ac2 100644
--- a/README.md
+++ b/README.md
@@ -22,4 +22,4 @@ Add the following step to your GitHub Actions workflow:
 | --- | --- | --- | --- |
 | `version` | Version of AetherPak CLI to install (e.g., `v0.2.0`, `latest`) | `latest` | No |
 | `repo` | GitHub repository containing the AetherPak CLI releases | `aetherpak/cli` | No |
-| `install-dependencies` | Whether to automatically install missing system dependencies (`flatpak`, `ostree`, `gpg`, `flatpak-builder`) via `apt-get` on Linux | `true` | No |
+| `install-dependencies` | Whether to automatically install missing system dependencies (`flatpak`, `ostree`, `flatpak-builder`) via `apt-get` on Linux | `true` | No |
diff --git a/action.yml b/action.yml
index 0f6b83f..3f443bc 100644
--- a/action.yml
+++ b/action.yml
@@ -20,7 +20,7 @@ inputs:
     required: false
     default: "aetherpak/cli"
   install-dependencies:
-    description: "Trigger installation of missing host dependencies (flatpak, ostree, gpg, flatpak-builder)"
+    description: "Trigger installation of missing host dependencies (flatpak, ostree, flatpak-builder)"
     required: false
     default: "true"
 
@@ -43,8 +43,11 @@ runs:
         MISSING=""
         command -v flatpak >/dev/null 2>&1 || MISSING="$MISSING flatpak"
         command -v ostree  >/dev/null 2>&1 || MISSING="$MISSING ostree"
-        command -v gpg     >/dev/null 2>&1 || MISSING="$MISSING gnupg"
         command -v flatpak-builder >/dev/null 2>&1 || MISSING="$MISSING flatpak-builder"
+        command -v patch >/dev/null 2>&1 || MISSING="$MISSING patch"
+        command -v unzip >/dev/null 2>&1 || MISSING="$MISSING unzip"
+        command -v bzip2 >/dev/null 2>&1 || MISSING="$MISSING bzip2"
+        command -v zstd  >/dev/null 2>&1 || MISSING="$MISSING zstd"
         if [ -n "$MISSING" ]; then
           if command -v apt-get >/dev/null 2>&1; then
             export DEBIAN_FRONTEND=noninteractive