diff --git a/lib/splitclient-rb/cache/stores/localhost_split_builder.rb b/lib/splitclient-rb/cache/stores/localhost_split_builder.rb
index b8f209ab..1fc2f949 100644
--- a/lib/splitclient-rb/cache/stores/localhost_split_builder.rb
+++ b/lib/splitclient-rb/cache/stores/localhost_split_builder.rb
@@ -22,7 +22,8 @@ def build_split(feature, treatments)
               seed: 2_089_907_429,
               defaultTreatment: 'control_treatment',
               configurations: build_configurations(treatments),
-              conditions: build_conditions(treatments)
+              conditions: build_conditions(treatments),
+              prerequisites: []
             }
           end
 
diff --git a/lib/splitclient-rb/engine/parser/evaluator.rb b/lib/splitclient-rb/engine/parser/evaluator.rb
index ec7636cd..578e1651 100644
--- a/lib/splitclient-rb/engine/parser/evaluator.rb
+++ b/lib/splitclient-rb/engine/parser/evaluator.rb
@@ -38,6 +38,16 @@ def split_configurations(treatment, split)
         end
 
         def match(split, keys, attributes)
+          if split.key?(:prerequisites) && !split[:prerequisites].nil?
+              prerequisites_matcher = SplitIoClient::PrerequisitesMatcher.new(split[:prerequisites], @config.split_logger) 
+              return treatment_hash(Models::Label::PREREQUISITES_NOT_MET, split[:defaultTreatment], split[:changeNumber], split_configurations(split[:defaultTreatment], split)) unless prerequisites_matcher.match?(
+                  matching_key: keys[:matching_key],
+                  bucketing_key: keys[:bucketing_key],
+                  evaluator: self,
+                  attributes: attributes
+                )
+          end
+
           in_rollout = false
           key = keys[:bucketing_key] ? keys[:bucketing_key] : keys[:matching_key]
           legacy_algo = (split[:algo] == 1 || split[:algo] == nil) ? true : false
diff --git a/spec/integrations/in_memory_client_spec.rb b/spec/integrations/in_memory_client_spec.rb
index 2f2024b2..209bd3ac 100644
--- a/spec/integrations/in_memory_client_spec.rb
+++ b/spec/integrations/in_memory_client_spec.rb
@@ -90,6 +90,30 @@
       expect(impressions[1][:treatment][:change_number]).to eq(1_506_703_262_916)
     end
 
+    it 'returns treatments with prereq_flag feature and check impressions' do
+      stub_request(:get, "https://sdk.split.io/api/splitChanges?s=1.3&since=1506703262916&rbSince=-1").to_return(status: 200, body: 'ok')
+      client.block_until_ready
+      expect(client.get_treatment('nico_test', 'prereq_flag')).to eq 'on'
+      expect(client.get_treatment('bla', 'prereq_flag')).to eq 'off_default'
+
+      sleep 0.5
+      impressions = custom_impression_listener.queue
+
+      expect(impressions.size).to eq 2
+
+      expect(impressions[0][:matching_key]).to eq('nico_test')
+      expect(impressions[0][:split_name]).to eq('prereq_flag')
+      expect(impressions[0][:treatment][:treatment]).to eq('on')
+      expect(impressions[0][:treatment][:label]).to eq('in segment all')
+      expect(impressions[0][:treatment][:change_number]).to eq(1494593336752)
+
+      expect(impressions[1][:matching_key]).to eq('bla')
+      expect(impressions[1][:split_name]).to eq('prereq_flag')
+      expect(impressions[1][:treatment][:treatment]).to eq('off_default')
+      expect(impressions[1][:treatment][:label]).to eq('prerequisites not met')
+      expect(impressions[1][:treatment][:change_number]).to eq(1494593336752)
+    end
+
     it 'returns treatments with Test_Save_1 feature and check impressions' do
       stub_request(:get, "https://sdk.split.io/api/splitChanges?s=1.3&since=1506703262916&rbSince=-1").to_return(status: 200, body: 'ok')
       client.block_until_ready
diff --git a/spec/test_data/integrations/splits.json b/spec/test_data/integrations/splits.json
index 9881fda2..1347a248 100644
--- a/spec/test_data/integrations/splits.json
+++ b/spec/test_data/integrations/splits.json
@@ -2521,6 +2521,59 @@
             "label": "in segment all"
           }
         ]
+      },
+      {
+        "impressionsDisabled": false,
+        "trafficTypeName": "account",
+        "name": "prereq_flag",
+        "prerequisites": [
+          {"n": "MAURO_TEST", "ts": ["off"]}, 
+          {"n": "FACUNDO_TEST", "ts": ["on"]}
+        ],
+        "trafficAllocation": 100,
+        "trafficAllocationSeed": -285565213,
+        "seed": -1992295819,
+        "status": "ACTIVE",
+        "killed": false,
+        "defaultTreatment": "off_default",
+        "changeNumber": 1494593336752,
+        "algo": 2,
+        "conditions": [
+          {
+            "conditionType": "ROLLOUT",
+            "matcherGroup": {
+              "combiner": "AND",
+              "matchers": [
+                {
+                  "keySelector": {
+                    "trafficType": "user",
+                    "attribute": null
+                  },
+                  "matcherType": "ALL_KEYS",
+                  "negate": false,
+                  "userDefinedSegmentMatcherData": null,
+                  "whitelistMatcherData": null,
+                  "unaryNumericMatcherData": null,
+                  "betweenMatcherData": null,
+                  "booleanMatcherData": null,
+                  "dependencyMatcherData": null,
+                  "stringMatcherData": null
+                }
+              ]
+            },
+            "partitions": [
+              {
+                "treatment": "on",
+                "size": 100
+              },
+              {
+                "treatment": "off",
+                "size": 0
+              }
+            ],
+            "label": "in segment all"
+          }
+        ]
       }
     ],
     "s": -1,