diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd2471b9..136f7802 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.9.1] - 2025-03-03
+### Fixed
+- Added quantization in the functions that convert notional values to chain format
+
 ## [1.9.0] - 2025-02-13
 ### Added
 - Added support for all new queries and messages from the new Permissions module
diff --git a/pyinjective/core/market.py b/pyinjective/core/market.py
index 3824232f..01973dc8 100644
--- a/pyinjective/core/market.py
+++ b/pyinjective/core/market.py
@@ -1,5 +1,5 @@
 from dataclasses import dataclass
-from decimal import Decimal
+from decimal import ROUND_UP, Decimal
 from typing import Optional
 
 from pyinjective.constant import ADDITIONAL_CHAIN_FORMAT_DECIMALS
@@ -39,7 +39,8 @@ def price_to_chain_format(self, human_readable_value: Decimal) -> Decimal:
     def notional_to_chain_format(self, human_readable_value: Decimal) -> Decimal:
         decimals = self.quote_token.decimals
         chain_formatted_value = human_readable_value * Decimal(f"1e{decimals}")
-        extended_chain_formatted_value = chain_formatted_value * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
+        quantized_balue = chain_formatted_value.quantize(Decimal("1"), rounding=ROUND_UP)
+        extended_chain_formatted_value = quantized_balue * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
 
         return extended_chain_formatted_value
 
@@ -120,7 +121,8 @@ def calculate_margin_in_chain_format(
     def notional_to_chain_format(self, human_readable_value: Decimal) -> Decimal:
         decimals = self.quote_token.decimals
         chain_formatted_value = human_readable_value * Decimal(f"1e{decimals}")
-        extended_chain_formatted_value = chain_formatted_value * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
+        quantized_notional = chain_formatted_value.quantize(Decimal("1"), rounding=ROUND_UP)
+        extended_chain_formatted_value = quantized_notional * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
 
         return extended_chain_formatted_value
 
@@ -230,7 +232,8 @@ def calculate_margin_in_chain_format(
     def notional_to_chain_format(self, human_readable_value: Decimal) -> Decimal:
         decimals = self.quote_token.decimals
         chain_formatted_value = human_readable_value * Decimal(f"1e{decimals}")
-        extended_chain_formatted_value = chain_formatted_value * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
+        quantized_value = chain_formatted_value.quantize(Decimal("1"), rounding=ROUND_UP)
+        extended_chain_formatted_value = quantized_value * Decimal(f"1e{ADDITIONAL_CHAIN_FORMAT_DECIMALS}")
 
         return extended_chain_formatted_value
 
diff --git a/pyproject.toml b/pyproject.toml
index 5b6cc95c..811c4747 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "injective-py"
-version = "1.9.0"
+version = "1.9.1"
 description = "Injective Python SDK, with Exchange API Client"
 authors = ["Injective Labs <contact@injectivelabs.org>"]
 license = "Apache-2.0"