diff --git a/omnibus/Gemfile.lock b/omnibus/Gemfile.lock
index 294d3b7b8..c793416d7 100644
--- a/omnibus/Gemfile.lock
+++ b/omnibus/Gemfile.lock
@@ -4,14 +4,15 @@ GIT
   branch: main
   specs:
     omnibus-software (25.10.350)
+      ffi (>= 1.17.0)
       omnibus (>= 9.0.0)
 
 GIT
   remote: https://github.com/chef/omnibus.git
-  revision: a1e33b8d33a6ea8013260f83b2764932d8dc2a0f
+  revision: b9f4c8f7ae7d01faebf6ee9188abcf207a4e823d
   branch: main
   specs:
-    omnibus (9.1.3)
+    omnibus (9.1.5)
       aws-sdk-s3 (~> 1.116.0)
       chef-cleanroom (~> 1.0)
       chef-utils (>= 15.4)
@@ -35,8 +36,8 @@ GEM
     ast (2.4.2)
     awesome_print (1.9.2)
     aws-eventstream (1.4.0)
-    aws-partitions (1.1171.0)
-    aws-sdk-core (3.233.0)
+    aws-partitions (1.1179.0)
+    aws-sdk-core (3.236.0)
       aws-eventstream (~> 1, >= 1.3.0)
       aws-partitions (~> 1, >= 1.992.0)
       aws-sigv4 (~> 1.9)
@@ -44,8 +45,8 @@ GEM
       bigdecimal
       jmespath (~> 1, >= 1.6.1)
       logger
-    aws-sdk-kms (1.113.0)
-      aws-sdk-core (~> 3, >= 3.231.0)
+    aws-sdk-kms (1.116.0)
+      aws-sdk-core (~> 3, >= 3.234.0)
       aws-sigv4 (~> 1.5)
     aws-sdk-s3 (1.116.0)
       aws-sdk-core (~> 3, >= 3.127.0)
@@ -173,7 +174,7 @@ GEM
       net-http
     fauxhai-chef (9.3.16)
       net-ssh
-    ffi (1.16.3)
+    ffi (1.17.0)
     ffi-libarchive (1.1.14)
       ffi (~> 1.0)
     ffi-yajl (2.6.0)
@@ -216,7 +217,7 @@ GEM
     iostruct (0.5.0)
     ipaddress (0.8.3)
     jmespath (1.6.2)
-    json (2.15.1)
+    json (2.15.2)
     kitchen-vagrant (2.0.1)
       test-kitchen (>= 1.4, < 4)
     libyajl2 (2.1.0)
@@ -386,9 +387,9 @@ GEM
     toml-rb (2.2.0)
       citrus (~> 3.0, > 3.0)
     tomlrb (1.3.0)
-    train-core (3.13.4)
+    train-core (3.12.13)
       addressable (~> 2.5)
-      ffi (~> 1.16.0)
+      ffi (!= 1.13.0)
       json (>= 1.8, < 3.0)
       mixlib-shellout (>= 2.0, < 4.0)
       net-scp (>= 1.2, < 5.0)