diff --git a/src/types/to_sql.rs b/src/types/to_sql.rs
index d6b3daf..3738217 100644
--- a/src/types/to_sql.rs
+++ b/src/types/to_sql.rs
@@ -57,8 +57,13 @@ macro_rules! to_sql_self(
 
 to_sql_self!(Null);
 to_sql_self!(bool);
+to_sql_self!(i8);
+to_sql_self!(i16);
 to_sql_self!(i32);
 to_sql_self!(i64);
+to_sql_self!(u8);
+to_sql_self!(u16);
+to_sql_self!(u32);
 to_sql_self!(f64);
 
 impl<'a, T: ?Sized> ToSql for &'a T
@@ -95,3 +100,21 @@ impl<T: ToSql> ToSql for Option<T> {
         }
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::ToSql;
+
+    fn is_to_sql<T: ToSql>() {}
+
+    #[test]
+    fn test_integral_types() {
+        is_to_sql::<i8>();
+        is_to_sql::<i16>();
+        is_to_sql::<i32>();
+        is_to_sql::<i64>();
+        is_to_sql::<u8>();
+        is_to_sql::<u16>();
+        is_to_sql::<u32>();
+    }
+}
diff --git a/src/types/value.rs b/src/types/value.rs
index 3628546..e192826 100644
--- a/src/types/value.rs
+++ b/src/types/value.rs
@@ -30,11 +30,22 @@ impl From<bool> for Value {
     }
 }
 
-impl From<i32> for Value {
-    fn from(i: i32) -> Value {
-        Value::Integer(i as i64)
-    }
-}
+macro_rules! from_i64(
+    ($t:ty) => (
+        impl From<$t> for Value {
+            fn from(i: $t) -> Value {
+                Value::Integer(i as i64)
+            }
+        }
+    )
+);
+
+from_i64!(i8);
+from_i64!(i16);
+from_i64!(i32);
+from_i64!(u8);
+from_i64!(u16);
+from_i64!(u32);
 
 impl From<i64> for Value {
     fn from(i: i64) -> Value {