diff --git a/Gemfile.lock b/Gemfile.lock
index 471a758..a7ee6b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     almond-rails (0.1.0)
       rails (>= 4.2, < 6)
     arel (8.0.0)
-    autoprefixer-rails (8.6.0)
+    autoprefixer-rails (9.7.1)
       execjs
     awesome_nested_set (3.1.4)
       activerecord (>= 4.0.0, < 5.3)
@@ -109,9 +109,9 @@ GEM
       bootstrap-sass (~> 3.0)
       openseadragon (>= 0.2.0)
       rails
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     bootstrap_form (2.7.0)
     breadcrumbs_on_rails (3.0.1)
     browse-everything (0.15.1)
@@ -216,7 +216,7 @@ GEM
       faraday
     fcrepo_wrapper (0.9.0)
       ruby-progressbar
-    ffi (1.9.25)
+    ffi (1.11.1)
     flipflop (2.4.0)
       activesupport (>= 4.0)
     flot-rails (0.0.7)
@@ -533,8 +533,8 @@ GEM
       thor (>= 0.18.1, < 2.0)
     rake (12.3.1)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     rdf (2.2.12)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
@@ -638,7 +638,7 @@ GEM
     rubyzip (1.2.2)
     samvera-nesting_indexer (2.0.0)
       dry-equalizer
-    sass (3.5.6)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -649,6 +649,8 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     select2-rails (3.5.10)
       thor (~> 0.14)
     selenium-webdriver (3.12.0)