diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57d47d7076..50197b2ac1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (types) [#12154](https://github.com/cosmos/cosmos-sdk/pull/12154) Add `baseAccountGetter` to avoid invalid account error when create vesting account.
 * (x/authz) [#12184](https://github.com/cosmos/cosmos-sdk/pull/12184) Fix MsgExec not verifying the validity of nested messages.
 * (x/crisis) [#12208](https://github.com/cosmos/cosmos-sdk/pull/12208) Fix progress index of crisis invariant assertion logs.
+* (types) [#12229](https://github.com/cosmos/cosmos-sdk/pull/12229) Increase sdk.Dec maxApproxRootIterations to 300
 
 ## [v0.46.0-rc1](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.46.0-rc1) - 2022-05-23
 
diff --git a/types/decimal.go b/types/decimal.go
index 795f4e6931..ca9dc3ca57 100644
--- a/types/decimal.go
+++ b/types/decimal.go
@@ -34,7 +34,7 @@ const (
 	maxDecBitLen = MaxBitLen + decimalTruncateBits
 
 	// max number of iterations in ApproxRoot function
-	maxApproxRootIterations = 100
+	maxApproxRootIterations = 300
 )
 
 var (
diff --git a/types/decimal_test.go b/types/decimal_test.go
index a6939c5f7a..9416b94938 100644
--- a/types/decimal_test.go
+++ b/types/decimal_test.go
@@ -433,11 +433,12 @@ func (s *decimalTestSuite) TestApproxRoot() {
 		{sdk.SmallestDec(), 2, sdk.NewDecWithPrec(1, 9)},                                       // 1e-18 ^ (0.5) => 1e-9
 		{sdk.SmallestDec(), 3, sdk.MustNewDecFromStr("0.000000999999999997")},                  // 1e-18 ^ (1/3) => 1e-6
 		{sdk.NewDecWithPrec(1, 8), 3, sdk.MustNewDecFromStr("0.002154434690031900")},           // 1e-8 ^ (1/3) ≈ 0.00215443469
+		{sdk.MustNewDecFromStr("9000002314687921634000000000000000000021394871242000000000000000"), 2, sdk.MustNewDecFromStr("94868342004527103646332858502867.899477053226766107")},
 	}
 
 	// In the case of 1e-8 ^ (1/3), the result repeats every 5 iterations starting from iteration 24
 	// (i.e. 24, 29, 34, ... give the same result) and never converges enough. The maximum number of
-	// iterations (100) causes the result at iteration 100 to be returned, regardless of convergence.
+	// iterations (300) causes the result at iteration 300 to be returned, regardless of convergence.
 
 	for i, tc := range testCases {
 		res, err := tc.input.ApproxRoot(tc.root)