diff --git a/lib/Database/PostgreSQL/Opium.hs b/lib/Database/PostgreSQL/Opium.hs
index d15a32c..71fcd2d 100644
--- a/lib/Database/PostgreSQL/Opium.hs
+++ b/lib/Database/PostgreSQL/Opium.hs
@@ -151,12 +151,12 @@ instance {-# OVERLAPPABLE #-} (FromField t, KnownSymbol nameSym) => FromRow' (M1
     (Left $ ErrorUnexpectedNull row nameText)
     Right
     where
-      nameText = Text.pack $ symbolVal (Proxy :: Proxy nameSym)
+      nameText = Text.pack $ symbolVal @nameSym Proxy
 
 instance {-# OVERLAPPING #-} (KnownSymbol nameSym, FromField t) => FromRow' (M1 S ('MetaSel ('Just nameSym) nu ns dl) (Rec0 (Maybe t))) where
   fromRow' = decodeField nameText $ const Right
     where
-      nameText = Text.pack $ symbolVal (Proxy :: Proxy nameSym)
+      nameText = Text.pack $ symbolVal @nameSym Proxy
 
 mapLeft :: (b -> c) -> Either b a -> Either c a
 mapLeft f (Left l) = Left $ f l
diff --git a/test/Database/PostgreSQL/OpiumSpec.hs b/test/Database/PostgreSQL/OpiumSpec.hs
index bd61898..4f5e24e 100644
--- a/test/Database/PostgreSQL/OpiumSpec.hs
+++ b/test/Database/PostgreSQL/OpiumSpec.hs
@@ -35,7 +35,7 @@ spec = do
   describe "getColumnTable" $ do
     it "Gets the column table for a result" $ \conn -> do
       Just result <- LibPQ.execParams conn "SELECT name, age FROM person" [] LibPQ.Text
-      columnTable <- Opium.getColumnTable (Proxy :: Proxy Person) result
+      columnTable <- Opium.getColumnTable @Person Proxy result
       columnTable `shouldBe` [0, 1]
 
     it "Gets the numbers right for funky configurations" $ \conn -> do