diff --git a/core-api/src/main/java/com/optimizely/ab/config/ProjectConfig.java b/core-api/src/main/java/com/optimizely/ab/config/ProjectConfig.java
index 3915fec8e..c41738581 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/ProjectConfig.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/ProjectConfig.java
@@ -36,7 +36,6 @@
 public class ProjectConfig {
 
     public enum Version {
-        V1 ("1"),
         V2 ("2"),
         V3 ("3");
 
diff --git a/core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java b/core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java
index 56dc808d2..8a37865d8 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java
@@ -64,11 +64,7 @@ public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParse
             List<Experiment> experiments = parseExperiments(rootObject.getJSONArray("experiments"));
 
             List<Attribute> attributes;
-            if (version.equals(ProjectConfig.Version.V1.toString())) {
-                attributes = parseAttributes(rootObject.getJSONArray("dimensions"));
-            } else {
-                attributes = parseAttributes(rootObject.getJSONArray("attributes"));
-            }
+            attributes = parseAttributes(rootObject.getJSONArray("attributes"));
 
             List<EventType> events = parseEvents(rootObject.getJSONArray("events"));
             List<Audience> audiences = parseAudiences(rootObject.getJSONArray("audiences"));
diff --git a/core-api/src/main/java/com/optimizely/ab/config/parser/JsonSimpleConfigParser.java b/core-api/src/main/java/com/optimizely/ab/config/parser/JsonSimpleConfigParser.java
index 7ed9f5b52..2c05e0c25 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/parser/JsonSimpleConfigParser.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/parser/JsonSimpleConfigParser.java
@@ -64,11 +64,7 @@ public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParse
             List<Experiment> experiments = parseExperiments((JSONArray)rootObject.get("experiments"));
 
             List<Attribute> attributes;
-            if (version.equals(ProjectConfig.Version.V1.toString())) {
-                throw new ConfigParseException("The Java SDK no longer supports datafile version 1. If you wish to use a Classic Custom Project, please use Java SDK version 1.6 or below.");
-            } else {
-                attributes = parseAttributes((JSONArray)rootObject.get("attributes"));
-            }
+            attributes = parseAttributes((JSONArray)rootObject.get("attributes"));
 
             List<EventType> events = parseEvents((JSONArray)rootObject.get("events"));
             List<Audience> audiences = parseAudiences((JSONArray)parser.parse(rootObject.get("audiences").toString()));
diff --git a/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigGsonDeserializer.java b/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigGsonDeserializer.java
index ea3faad91..cb0b172c2 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigGsonDeserializer.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigGsonDeserializer.java
@@ -60,11 +60,7 @@ public ProjectConfig deserialize(JsonElement json, Type typeOfT, JsonDeserializa
             context.deserialize(jsonObject.get("experiments").getAsJsonArray(), experimentsType);
 
         List<Attribute> attributes;
-        if (version.equals(ProjectConfig.Version.V1.toString())) {
-            attributes = context.deserialize(jsonObject.get("dimensions"), attributesType);
-        } else {
-            attributes = context.deserialize(jsonObject.get("attributes"), attributesType);
-        }
+        attributes = context.deserialize(jsonObject.get("attributes"), attributesType);
 
         List<EventType> events =
             context.deserialize(jsonObject.get("events").getAsJsonArray(), eventsType);
diff --git a/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigJacksonDeserializer.java b/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigJacksonDeserializer.java
index 38c844457..e8722086a 100644
--- a/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigJacksonDeserializer.java
+++ b/core-api/src/main/java/com/optimizely/ab/config/parser/ProjectConfigJacksonDeserializer.java
@@ -57,11 +57,7 @@ public ProjectConfig deserialize(JsonParser parser, DeserializationContext conte
                                                         new TypeReference<List<Experiment>>() {});
 
         List<Attribute> attributes;
-        if (version.equals(ProjectConfig.Version.V1.toString())) {
-            attributes = mapper.readValue(node.get("dimensions").toString(), new TypeReference<List<Attribute>>() {});
-        } else {
-            attributes = mapper.readValue(node.get("attributes").toString(), new TypeReference<List<Attribute>>() {});
-        }
+        attributes = mapper.readValue(node.get("attributes").toString(), new TypeReference<List<Attribute>>() {});
 
         List<EventType> events = mapper.readValue(node.get("events").toString(),
                                                   new TypeReference<List<EventType>>() {});