diff --git a/CHANGELOG.md b/CHANGELOG.md
index c45647f6b..127278024 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@
 - Refactored backend database `runDb` helper in `app/Config.hs`
 - Refactored `Database.Tables.MeetTime` into `Models.Meeting` and renamed it to `MeetingParsedData`; consolidated and refactored timetable JSON parsing helpers
 - Restructured `courseography.cabal` to separate executable from library, extract shared settings, and remove `hlint`
+- Refactored `createReqBody` in `app/Config.hs` to use session field from `config.yaml`
 
 ## [0.8.1] - 2026-08-10
 
diff --git a/app/Config.hs b/app/Config.hs
index 1319dd591..097ee3314 100644
--- a/app/Config.hs
+++ b/app/Config.hs
@@ -17,6 +17,7 @@ module Config (
     timetableApiUrl,
     fasCalendarUrl,
     programsUrl,
+    timetableSessions,
     createReqBody,
     reqHeaders,
     fallStartDate,
@@ -51,6 +52,7 @@ data Config = Config
     , timetableApiUrlValue :: Text
     , fasCalendarUrlValue :: String
     , programsUrlValue :: String
+    , timetableSessionsValue :: [T.Text]
     , fallStartDateValue :: Day
     , fallEndDateValue :: Day
     , winterStartDateValue :: Day
@@ -73,6 +75,7 @@ instance FromJSON Config where
             <*> obj .: "timetableApiUrl"
             <*> obj .: "fasCalendarUrl"
             <*> obj .: "programsUrl"
+            <*> obj .: "timetableSessions"
             <*> obj .: "fallStartDate"
             <*> obj .: "fallEndDate"
             <*> obj .: "winterStartDate"
@@ -159,11 +162,17 @@ fasCalendarUrl = fasCalendarUrlValue <$> loadConfig
 programsUrl :: IO String
 programsUrl = programsUrlValue <$> loadConfig
 
+-- DATA FETCHING PARAMETERS
+
+-- | The sessions field for the timetable API
+timetableSessions :: IO [T.Text]
+timetableSessions = timetableSessionsValue <$> loadConfig
+
 -- HTTP REQUEST STRINGS
 
 -- | Create the body for the HTTP request based on the page
-createReqBody :: Int -> Value
-createReqBody page =
+createReqBody :: [T.Text] -> Int -> Value
+createReqBody sessions page =
     object
         [ "campuses" .= ([] :: [T.Text])
         , "courseCodeAndTitleProps"
@@ -184,7 +193,7 @@ createReqBody page =
         , "page" .= page
         , "pageSize" .= (300 :: Int)
         , "requirementProps" .= ([] :: [T.Text])
-        , "sessions" .= (["20269", "20271", "20269-20271"] :: [T.Text])
+        , "sessions" .= sessions
         , "timePreferences" .= ([] :: [T.Text])
         ]
 
diff --git a/app/WebParsing/UtsgJsonParser.hs b/app/WebParsing/UtsgJsonParser.hs
index d33ca267c..350590570 100644
--- a/app/WebParsing/UtsgJsonParser.hs
+++ b/app/WebParsing/UtsgJsonParser.hs
@@ -1,6 +1,6 @@
 module WebParsing.UtsgJsonParser (parseTimetable, insertTimetableData) where
 
-import Config (createReqBody, reqHeaders, runDb, timetableApiUrl)
+import Config (createReqBody, reqHeaders, runDb, timetableApiUrl, timetableSessions)
 import Control.Monad.IO.Class (liftIO)
 import Data.Aeson (Object, decode, encode, (.!=), (.:), (.:?))
 import Data.Aeson.Types (Parser, parseMaybe)
@@ -34,7 +34,8 @@ parseTimetable = do
 makeRequest :: Int -> IO ByteString
 makeRequest pageNum = do
     -- set up the request
-    let reqBody = createReqBody pageNum
+    sessions <- timetableSessions
+    let reqBody = createReqBody sessions pageNum
     timetableApi <- liftIO timetableApiUrl
     request <- liftIO $ parseRequest (T.unpack timetableApi)
     let request' = request{method = "POST", requestBody = RequestBodyLBS $ encode reqBody, requestHeaders = reqHeaders}
diff --git a/config.yaml b/config.yaml
index 7f2e22ac2..eceb7866b 100644
--- a/config.yaml
+++ b/config.yaml
@@ -16,6 +16,12 @@ timetableApiUrl: "https://api.easi.utoronto.ca/ttb/getPageableCourses"
 fasCalendarUrl: "https://artsci.calendar.utoronto.ca/"
 programsUrl: "https://artsci.calendar.utoronto.ca/listing-program-subject-areas"
 
+# Data fetching parameters
+timetableSessions:
+  - "20269"
+  - "20271"
+  - "20269-20271"
+
 # Term dates
 fallStartDate: 2026-09-08
 fallEndDate: 2026-12-07