diff --git a/Cargo.toml b/Cargo.toml
index cfc03e7..e567198 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,11 @@ readme = "README.md"
 byteorder = "1"
 bytes = "1"
 postgres = { version = "0.19", optional = true }
-diesel = { version = "2", features = ["postgres"], optional = true }
+diesel = { version = "2", default-features = false, features = ["postgres"], optional = true }
 sqlx = { version = ">= 0.5, < 0.8", default-features = false, features = ["postgres"], optional = true }
 
 [dev-dependencies]
+diesel = { version = "2", features = ["32-column-tables"] }
 sqlx = { version = "0", default-features = false, features = ["runtime-async-std-native-tls"] }
 async-std = { version = "1", features = ["attributes"] }