diff --git a/HCKalmanFilter.podspec b/HCKalmanFilter.podspec
index 017765f..c0c676f 100644
--- a/HCKalmanFilter.podspec
+++ b/HCKalmanFilter.podspec
@@ -1,6 +1,5 @@
 Pod::Spec.new do |s|
 
-s.platform = :ios
 s.name             = "HCKalmanFilter"
 s.version          = "1.2.2"
 s.summary          = "HCKalmanFilter is Swift implementation of Kalman filter algorithm intended to solve problem with GPS tracking"
@@ -15,8 +14,10 @@ s.author           = { "Hypercubesoft" => "office@hypercubesoft.com" }
 s.source           = { :git => "https://github.com/Hypercubesoft/HCKalmanFilter.git", :tag => "#{s.version}"}
 
 s.ios.deployment_target = "9.0"
+s.watchos.deployment_target = '3.0'
+
 s.source_files = "HCKalmanFilter/*"
 
-s.dependency 'Surge', '~> 2.0.0'
+s.dependency 'Surge', '~> 2.3.2'
 
-end
\ No newline at end of file
+end
diff --git a/HCKalmanFilter/HCMatrixObject.swift b/HCKalmanFilter/HCMatrixObject.swift
index d99d301..2f74e92 100644
--- a/HCKalmanFilter/HCMatrixObject.swift
+++ b/HCKalmanFilter/HCMatrixObject.swift
@@ -173,7 +173,7 @@ class HCMatrixObject
     {
         let result = HCMatrixObject(rows: left.rows, columns: left.columns)
         
-        result.matrix = Surge.add(left.matrix, y: right.matrix)
+        result.matrix = Surge.add(left.matrix, right.matrix)
         
         return result
     }
@@ -214,7 +214,7 @@ class HCMatrixObject
     /// - returns: result HCMatrixObject object of multiplication operation
     static func *(left:HCMatrixObject, right:HCMatrixObject) -> HCMatrixObject?
     {
-        let resultMatrix = Surge.mul(left.matrix, y: right.matrix)
+        let resultMatrix = Surge.mul(left.matrix, right.matrix)
         
         let result = HCMatrixObject(rows: resultMatrix.rows,columns: resultMatrix.columns)
         result.matrix = resultMatrix