diff --git a/mongo.gemspec b/mongo.gemspec
index 0226011936..2c58491b8b 100644
--- a/mongo.gemspec
+++ b/mongo.gemspec
@@ -41,11 +41,5 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = ">= 2.5"
 
-  # For testing driver against bson master we need to depend on bson < 6.0.0
-  # but in release version we want to depend on bson < 5.0.0.
-  if %w(1 yes true).include?(ENV['MONGO_RUBY_DRIVER_BSON_MASTER'])
-    s.add_dependency 'bson', '>=4.13.0', '<6.0.0'
-  else
-    s.add_dependency 'bson', '>=4.14.1', '<5.0.0'
-  end
+  s.add_dependency 'bson', '>=4.14.1', '<6.0.0'
 end
diff --git a/spec/integration/client_side_encryption/corpus_spec.rb b/spec/integration/client_side_encryption/corpus_spec.rb
index 2ecc8e40df..aac6347694 100644
--- a/spec/integration/client_side_encryption/corpus_spec.rb
+++ b/spec/integration/client_side_encryption/corpus_spec.rb
@@ -188,6 +188,15 @@
       key_vault_collection.insert_one(kmip_data_key)
     end
 
+    # This method compensates for an API change between BSON 4 and
+    # BSON 5.
+    def normalize_cse_value(a)
+      case a
+      when BSON::Decimal128 then a.to_d
+      else a
+      end
+    end
+
     shared_context 'with jsonSchema collection validator' do
       let(:local_schema_map) { nil }
 
@@ -228,12 +237,11 @@
           .find(_id: corpus_encrypted_id)
           .first
 
-
         corpus_encrypted_actual.each do |key, value|
           # If it was deterministically encrypted, test the encrypted values
           # for equality.
           if value['algo'] == 'det'
-            expect(value['value']).to eq(corpus_encrypted_expected[key]['value'])
+            expect(normalize_cse_value(value['value'])).to eq(normalize_cse_value(corpus_encrypted_expected[key]['value']))
           else
             # If the document was randomly encrypted, the two encrypted values
             # will not be equal. Ensure that they are equal when decrypted.
diff --git a/spec/shared b/spec/shared
index bd968a969a..cee4bc0264 160000
--- a/spec/shared
+++ b/spec/shared
@@ -1 +1 @@
-Subproject commit bd968a969aed7ae4d579855f2ce5b3e3201444a4
+Subproject commit cee4bc02649a573c8256b0505c1d23f503ac2609