diff --git a/config/config-kraken.yml b/config/config-kraken.yml
index ef44faf..aed4480 100644
--- a/config/config-kraken.yml
+++ b/config/config-kraken.yml
@@ -12,7 +12,7 @@ capture:
   replay:
     state: false
     loop: true
-    file: '/opt/blah2/replay/file.hackrf'
+    file: '/opt/blah2/replay/file.kraken'
 
 process:
   data:
diff --git a/src/capture/Capture.cpp b/src/capture/Capture.cpp
index 0eb0d1a..b734528 100644
--- a/src/capture/Capture.cpp
+++ b/src/capture/Capture.cpp
@@ -8,7 +8,7 @@
 #include <httplib.h>
 
 // constants
-const std::vector<std::string> Capture::VALID_TYPE = {"RspDuo", "Usrp", "HackRF", "Kraken"};
+const std::string Capture::VALID_TYPE[4] = {"RspDuo", "Usrp", "HackRF", "Kraken"};
 
 // constructor
 Capture::Capture(std::string _type, uint32_t _fs, uint32_t _fc, std::string _path)
@@ -127,17 +127,17 @@ std::unique_ptr<Source> Capture::factory_source(const std::string& type, c4::yml
         serial, gainLna, gainVga, ampEnable);
     }
     // Kraken
-    // else if (type == VALID_TYPE[3])
-    // {
-    //   std::vector<double> gain;
-    //   float _gain;
-    //   for (auto child : config["gain"].children())
-    //   {
-    //     c4::atof(child.val(), &_gain);
-    //     gain.push_back(static_cast<double>(_gain));
-    //   }
-    //   return std::make_unique<Kraken>(type, fc, fs, path, &saveIq, gain);
-    // }
+    else if (type == VALID_TYPE[3])
+    {
+      std::vector<double> gain;
+      float _gain;
+      for (auto child : config["gain"].children())
+      {
+        c4::atof(child.val(), &_gain);
+        gain.push_back(static_cast<double>(_gain));
+      }
+      return std::make_unique<Kraken>(type, fc, fs, path, &saveIq, gain);
+    }
     // handle unknown type
     std::cerr << "Error: Source type does not exist." << std::endl;
     return nullptr;
diff --git a/src/capture/Capture.h b/src/capture/Capture.h
index dddc7a1..9994d4b 100644
--- a/src/capture/Capture.h
+++ b/src/capture/Capture.h
@@ -20,7 +20,7 @@ class Capture
 {
 private:
   /// @brief The valid capture devices.
-  static const std::vector<std::string> VALID_TYPE;
+  static const std::string VALID_TYPE[4];
 
   /// @brief The capture device type.
   std::string type;
diff --git a/src/capture/kraken/Kraken.cpp b/src/capture/kraken/Kraken.cpp
index bc04b74..b85b971 100644
--- a/src/capture/kraken/Kraken.cpp
+++ b/src/capture/kraken/Kraken.cpp
@@ -32,8 +32,13 @@ Kraken::Kraken(std::string _type, uint32_t _fc, uint32_t _fs,
     for (int i = 0; i <= _gain.size(); i++)
     {
         int adjustedGain = static_cast<int>(_gain[i] * 10);
-        gain.push_back(std::lower_bound(validGains.begin(), 
-            validGains.end(), adjustedGain));
+        auto it = std::lower_bound(validGains.begin(), 
+            validGains.end(), adjustedGain);
+        if (it != validGains.end()) {
+            gain.push_back(*it);
+        } else {
+            gain.push_back(validGains.back());
+        }
         std::cout << "[Kraken] Gain update on channel " << i << " from " << 
             adjustedGain << " to " << gain[i] << "." << std::endl;
     }