diff --git a/src/main.py b/src/main.py
index 8e8681c..7652a8f 100644
--- a/src/main.py
+++ b/src/main.py
@@ -53,6 +53,10 @@ if corpusAge > 1036800:
 else:
     log.out('main.py: Not updating stations data', "INFO")
 
+log.out('main.py: Requesting TTL Index Creation', "INFO")
+mongo.createTtlIndex("users", "atime", 31557600)
+mongo.createTtlIndex("registrations", "time", 1800)
+
 # Push version number to database for reporting
 mongo.putVersion(version)
 
diff --git a/src/mongo.py b/src/mongo.py
index 57712d2..fda809c 100644
--- a/src/mongo.py
+++ b/src/mongo.py
@@ -44,6 +44,11 @@ def createSingleIndex(collection, field):
     log.out(f'mongo.createSingleIndex: Created index of {field} in {collection}', "INFO")
     return
 
+def createTtlIndex(collection, field, time):
+    col = db[collection]
+    col.create_index(field, expireAfterSeconds = time)
+    log.out(f'mongo.createTtlIndex: Created TTL Index of {field} in {collection} to expire after {time} seconds', "INFO")
+
 def putBulkCorpus(data):
     collection = "corpus"
     startCount = getLength(collection)