diff --git a/flake.lock b/flake.lock
index 08360d5..6eb8460 100644
--- a/flake.lock
+++ b/flake.lock
@@ -44,6 +44,27 @@
         "type": "github"
       }
     },
+    "crowdsec": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1717702314,
+        "narHash": "sha256-C0UwatW9w+wHCNedn6iWHbM3AxADZ2XK49sZfs4aUlM=",
+        "ref": "refs/heads/main",
+        "rev": "824048e7503820d508f25d44ebe2570263a20d79",
+        "revCount": 11,
+        "type": "git",
+        "url": "https://codeberg.org/kampka/nix-flake-crowdsec.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://codeberg.org/kampka/nix-flake-crowdsec.git"
+      }
+    },
     "darwin": {
       "inputs": {
         "nixpkgs": [
@@ -142,6 +163,23 @@
       "inputs": {
         "systems": "systems_4"
       },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
+    "flake-utils_3": {
+      "inputs": {
+        "systems": "systems_5"
+      },
       "locked": {
         "lastModified": 1681202837,
         "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
@@ -238,7 +276,7 @@
     "nix-minecraft": {
       "inputs": {
         "flake-compat": "flake-compat_2",
-        "flake-utils": "flake-utils_2",
+        "flake-utils": "flake-utils_3",
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
@@ -367,6 +405,7 @@
       "inputs": {
         "agenix": "agenix",
         "agenix-rekey": "agenix-rekey",
+        "crowdsec": "crowdsec",
         "home-manager": "home-manager_2",
         "impermanence": "impermanence",
         "nix-minecraft": "nix-minecraft",
@@ -433,6 +472,21 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_5": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index b07aa2d..60c78f9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,6 +20,12 @@
     };
     impermanence.url = "github:nix-community/impermanence";
 
+    # Security enhancement.
+    crowdsec = {
+      url = "git+https://codeberg.org/kampka/nix-flake-crowdsec.git";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     # Add any other flake you might need.
     nix-minecraft.url = "github:Infinidoge/nix-minecraft";
   };