diff --git a/runtime/gdev/src/parameters.rs b/runtime/gdev/src/parameters.rs
index 332acc64f7f63d604eb933bb4c48019275052822..df48d06d0c12f1a42b1b5aea95b2c20bddfa1c61 100644
--- a/runtime/gdev/src/parameters.rs
+++ b/runtime/gdev/src/parameters.rs
@@ -81,7 +81,8 @@ frame_support::parameter_types! {
 
 // Universal dividend
 parameter_types! {
-    pub const SquareMoneyGrowthRate: Permill = Permill::one();
+    // 0.002_381_440 = 0.0488^2
+    pub const SquareMoneyGrowthRate: Permill = Permill::from_parts(2_381_440);
 }
 
 // Multisig
diff --git a/runtime/gtest/src/parameters.rs b/runtime/gtest/src/parameters.rs
index 4f75ac1ffa88b6f59d7ade20b5b1f503643eb206..86442e54fca95e592b3eb30d684b74a3bd6c2851 100644
--- a/runtime/gtest/src/parameters.rs
+++ b/runtime/gtest/src/parameters.rs
@@ -88,7 +88,7 @@ parameter_types! {
     pub const UdCreationPeriod: BlockNumber = DAYS;
     pub const UdFirstReeval: BlockNumber = 2 * DAYS;
     pub const UdReevalPeriod: Balance = 7;
-    pub const UdReevalPeriodInBlocks: BlockNumber = 100800; // 86400 *7 / 6
+    pub const UdReevalPeriodInBlocks: BlockNumber = 100800; // 86400 * 7 / 6
 }
 
 /*******/