diff --git a/.env.example b/.env.example
index ee8bad2..195ca3f 100644
--- a/.env.example
+++ b/.env.example
@@ -24,9 +24,11 @@ TWITTER_API_PLAN=
 OPENAI_API_KEY=
 
 # Answer engine settings
-#ANSWER_ENGINE='openai' | 'dexa'
+#ANSWER_ENGINE='openai' | 'dexa' | 'perplexity'
 # If you're using dexa (api currently in private beta), then DEXA_API_KEY is required
 #DEXA_API_KEY=
+# If you're using perplexity, then PERPLEXITY_API_KEY is required
+#PERPLEXITY_API_KEY=
 
 # Optional database settings
 # If REDIS_URL isn't defined and REQUIRE_REDIS=true, the app will abort.
diff --git a/readme.md b/readme.md
index 7eee8da..966182f 100644
--- a/readme.md
+++ b/readme.md
@@ -38,7 +38,7 @@ Usage:
   xbot [flags...]
 
 Flags:
-  -a, --answer-engine <string>                      Answer engine to use (openai of dexa) (default: "openai")
+  -a, --answer-engine <string>                      Answer engine to use (openai, dexa, or perplexity) (default: "openai")
       --debug                                       Enables debug logging
   -t, --debug-tweet-ids <string>                    Specifies a tweet to process instead of responding to mentions with
                                                     the default behavior. Multiple tweets ids can be specified (-t id1
diff --git a/src/parse-cli-args.ts b/src/parse-cli-args.ts
index a2d3dbc..e4cb95f 100644
--- a/src/parse-cli-args.ts
+++ b/src/parse-cli-args.ts
@@ -72,7 +72,7 @@ export function parseCLIArgs(
         },
         answerEngine: {
           type: String,
-          description: 'Answer engine to use (openai of dexa)',
+          description: 'Answer engine to use (openai, dexa, or perplexity)',
           alias: 'a',
           default: overrides?.answerEngine ?? config.defaultAnswerEngineType
         }