diff --git a/install.sh b/install.sh
index efdf004..038c0f6 100755
--- a/install.sh
+++ b/install.sh
@@ -4,7 +4,6 @@ set -e
 REPO="chris/agent-tui"
 BASE_URL="https://gitea.yeeted.lol"
 INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"
-TAG="${1:-v0.1.0}"
 
 OS=$(uname -s | tr '[:upper:]' '[:lower:]')
 ARCH=$(uname -m)
@@ -20,6 +19,18 @@ case "$OS" in
   *) echo "Unsupported OS: $OS" >&2; exit 1 ;;
 esac
 
+# Resolve tag: use argument, or fetch latest release
+if [ -n "$1" ]; then
+  TAG="$1"
+else
+  TAG=$(curl -fsSL "${BASE_URL}/api/v1/repos/${REPO}/releases?limit=1" \
+    | grep -o '"tag_name":"[^"]*"' | head -1 | cut -d'"' -f4)
+  if [ -z "$TAG" ]; then
+    echo "Error: could not determine latest release" >&2
+    exit 1
+  fi
+fi
+
 BINARY="agent-tui-${OS}-${ARCH}"
 URL="${BASE_URL}/${REPO}/releases/download/${TAG}/${BINARY}"
 
@@ -45,4 +56,4 @@ else
   sudo mv "$TMP" "${INSTALL_DIR}/agent-tui"
 fi
 
-echo "Installed agent-tui to ${INSTALL_DIR}/agent-tui"
+echo "Installed agent-tui ${TAG} to ${INSTALL_DIR}/agent-tui"