diff --git a/common/packages.nix b/common/packages.nix
index 5b42e20..7b10fb9 100644
--- a/common/packages.nix
+++ b/common/packages.nix
@@ -122,6 +122,7 @@ in
         tflint
         tfsec
         tfswitch
+        infracost
 
         # gcp
         google-cloud-sdk
@@ -158,7 +159,7 @@ in
         # ruby
         rbenv
         rubocop
-        ruby
+        ruby_3_1
         rufo
         rubyPackages.solargraph
 
diff --git a/flake.lock b/flake.lock
index 34ca694..b99f7d6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -58,11 +58,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1643151280,
-        "narHash": "sha256-sVlOWjDm+QU9vIjY+awfOwB5T/Sl8R+LkP9sNXhVCw4=",
+        "lastModified": 1643411645,
+        "narHash": "sha256-q1TjWmK1MeGNfcU8ud11v9ZTqq2UI8YiCVKCD2MeAEk=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "990ca662c4b92636053ea399f5fb80702830522c",
+        "rev": "acf824c9ed70f623b424c2ca41d0f6821014c67c",
         "type": "github"
       },
       "original": {
@@ -78,11 +78,11 @@
       },
       "locked": {
         "dir": "contrib",
-        "lastModified": 1643095335,
-        "narHash": "sha256-NgrojDU8ziCZ6ImaD4xJ+6zw7OoWZSgiZYoD7dWCSVE=",
+        "lastModified": 1643415762,
+        "narHash": "sha256-qyk81eVlmm2U7apLHZlggoj1v9MIKX1YWWaALPKPNFc=",
         "owner": "neovim",
         "repo": "neovim",
-        "rev": "ecec957125ca95ef5fbc4534d62ed16cfedb0c44",
+        "rev": "082ff2190c793d21c213748e556191f8aaa76cde",
         "type": "github"
       },
       "original": {
@@ -99,11 +99,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1643184788,
-        "narHash": "sha256-CEegWL0dzfhfWTdnMRK7A/DWh7tcKFWQ1wAWEHaSw/Q=",
+        "lastModified": 1643443970,
+        "narHash": "sha256-NVm4ccMpP72i5kD8izidLD3a4s/5WlWesrYv1Arz8O4=",
         "owner": "nix-community",
         "repo": "neovim-nightly-overlay",
-        "rev": "1e96ff0474cbbae7e72f49739a7b09f48fe25c62",
+        "rev": "4c80ac9a435c2a0d22cb7067eb65cf3f6962124d",
         "type": "github"
       },
       "original": {
@@ -130,11 +130,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1643080866,
-        "narHash": "sha256-iO3Z6jw0HEiie8UnXVpq1SxphprDYBXrVzubEa5D4eE=",
+        "lastModified": 1643347846,
+        "narHash": "sha256-O0tyXF//ppRpe9yT1Uu5n34yI2MWDyY6ZiJ4Qn5zIkE=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c07b471b52be8fbc49a7dc194e9b37a6e19ee04d",
+        "rev": "5bb20f9dc70e9ee16e21cc404b6508654931ce41",
         "type": "github"
       },
       "original": {
@@ -146,11 +146,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1643080866,
-        "narHash": "sha256-iO3Z6jw0HEiie8UnXVpq1SxphprDYBXrVzubEa5D4eE=",
+        "lastModified": 1643169865,
+        "narHash": "sha256-+KIpNRazbc8Gac9jdWCKQkFv9bjceaLaLhlwqUEYu8c=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c07b471b52be8fbc49a7dc194e9b37a6e19ee04d",
+        "rev": "945ec499041db73043f745fad3b2a3a01e826081",
         "type": "github"
       },
       "original": {
@@ -162,11 +162,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1643080866,
-        "narHash": "sha256-iO3Z6jw0HEiie8UnXVpq1SxphprDYBXrVzubEa5D4eE=",
+        "lastModified": 1643347846,
+        "narHash": "sha256-O0tyXF//ppRpe9yT1Uu5n34yI2MWDyY6ZiJ4Qn5zIkE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c07b471b52be8fbc49a7dc194e9b37a6e19ee04d",
+        "rev": "5bb20f9dc70e9ee16e21cc404b6508654931ce41",
         "type": "github"
       },
       "original": {