diff --git a/config/settings.yml b/config/settings.yml
index ba559c3..a28a838 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -23,3 +23,4 @@ force-ssl: false
 # dev-download: false
 
 postgres-string: "_env:PGSTRING:host=localhost port=5432 user=stackage dbname=stackage password=stackage"
+postgres-poolsize: "_env:PGPOOLSIZE:8"
diff --git a/src/Application.hs b/src/Application.hs
index 8454f55..94e5a97 100644
--- a/src/Application.hs
+++ b/src/Application.hs
@@ -140,7 +140,7 @@ withFoundation appLogFunc appSettings inner = do
                 gitRepoDev fp loadWebsiteContent
             else gitRepo "https://github.com/fpco/stackage-content.git" "master" loadWebsiteContent
     let pgConf =
-            PostgresConf {pgPoolSize = 2, pgConnStr = encodeUtf8 $ appPostgresString appSettings}
+            PostgresConf {pgPoolSize = appPostgresPoolsize appSettings, pgConnStr = encodeUtf8 $ appPostgresString appSettings}
         -- Temporary workaround to force content updates regularly, until
         -- distribution of webhooks is handled via consul
         runContentUpdates =
diff --git a/src/Settings.hs b/src/Settings.hs
index 889d724..6fe9a3f 100644
--- a/src/Settings.hs
+++ b/src/Settings.hs
@@ -39,6 +39,8 @@ data AppSettings = AppSettings
     -- behind a reverse proxy.
     , appPostgresString         :: !Text
     -- ^ PostgreSQL connection string
+    , appPostgresPoolsize       :: !Int
+    -- ^ PostgreSQL poolsize
 
     , appDetailedRequestLogging :: Bool
     -- ^ Use detailed request logging system
@@ -71,6 +73,7 @@ instance FromJSON AppSettings where
         appPort                   <- o .: "port"
         appIpFromHeader           <- o .: "ip-from-header"
         appPostgresString         <- o .: "postgres-string"
+        appPostgresPoolsize       <- o .: "postgres-poolsize"
 
         dev                       <- o .:? "development" .!= defaultDev
 
diff --git a/stack.yaml b/stack.yaml
index 5c8f607..1c8f98a 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -13,6 +13,9 @@ extra-deps:
   subdirs:
      - casa-client
      - casa-types
+- github: yesodweb/persistent
+  commit: f66ed6f472ff3faa140db37bf4649e5b80be4c57
+  subdirs: [persistent]
 
 drop-packages:
 - Cabal