diff --git a/src/aliceVision/localization/LocalizationResult.cpp b/src/aliceVision/localization/LocalizationResult.cpp
index b0491be695..f07cca70d8 100644
--- a/src/aliceVision/localization/LocalizationResult.cpp
+++ b/src/aliceVision/localization/LocalizationResult.cpp
@@ -160,7 +160,7 @@ void LocalizationResult::load(std::vector<LocalizationResult>& localizationResul
   // empty output vector
   localizationResults.clear();
 
-  Vec3 version;
+  Version version;
 
   // main tree
   bpt::ptree fileTree;
@@ -169,7 +169,11 @@ void LocalizationResult::load(std::vector<LocalizationResult>& localizationResul
   bpt::read_json(filename, fileTree);
 
   // version
-  sfmDataIO::loadMatrix("version", version, fileTree);
+  {
+    Vec3i v;
+    sfmDataIO::loadMatrix("version", v, fileTree);
+    version = v;
+  }
 
   if(fileTree.count("localizationResults"))
   {
@@ -251,7 +255,7 @@ void LocalizationResult::save(const std::vector<LocalizationResult>& localizatio
 {
   using namespace aliceVision::sfm;
 
-  const Vec3 version = {1, 0, 0};
+  const Vec3i version = {1, 0, 0};
 
   // main tree
   bpt::ptree fileTree;
diff --git a/src/aliceVision/numeric/numeric.hpp b/src/aliceVision/numeric/numeric.hpp
index 214805ad86..1475c13e95 100644
--- a/src/aliceVision/numeric/numeric.hpp
+++ b/src/aliceVision/numeric/numeric.hpp
@@ -69,9 +69,12 @@ using Eigen::Map;
 using EigenDoubleTraits = Eigen::NumTraits<double>;
 
 using Vec3 = Eigen::Vector3d;
+using Vec3i = Eigen::Vector3i;
+using Vec3f = Eigen::Vector3f;
+
 using Vec2i = Eigen::Vector2i;
 using Vec2f = Eigen::Vector2f;
-using Vec3f = Eigen::Vector3f;
+
 using Vec9 = Eigen::Matrix<double, 9, 1>;
 
 using Quaternion = Eigen::Quaternion<double>;
diff --git a/src/aliceVision/sfmDataIO/jsonIO.cpp b/src/aliceVision/sfmDataIO/jsonIO.cpp
index adebe20fa6..42a7a39d04 100644
--- a/src/aliceVision/sfmDataIO/jsonIO.cpp
+++ b/src/aliceVision/sfmDataIO/jsonIO.cpp
@@ -163,7 +163,7 @@ void loadIntrinsic(const Version & version, IndexT& intrinsicId, std::shared_ptr
 
   // Focal length
   Vec2 pxFocalLength;
-  if (version < Version(1,2,0)) // version < 1.2
+  if (version < Version(1,2,0))
   {
       pxFocalLength(0) = intrinsicTree.get<double>("pxFocalLength", -1);
       // Only one focal value for X and Y in previous versions
@@ -332,7 +332,7 @@ void loadLandmark(IndexT& landmarkId, sfmData::Landmark& landmark, bpt::ptree& l
 
 bool saveJSON(const sfmData::SfMData& sfmData, const std::string& filename, ESfMData partFlag)
 {
-  const Vec3 version = {ALICEVISION_SFMDATAIO_VERSION_MAJOR, ALICEVISION_SFMDATAIO_VERSION_MINOR, ALICEVISION_SFMDATAIO_VERSION_REVISION};
+  const Vec3i version = {ALICEVISION_SFMDATAIO_VERSION_MAJOR, ALICEVISION_SFMDATAIO_VERSION_MINOR, ALICEVISION_SFMDATAIO_VERSION_REVISION};
 
   // save flags
   const bool saveViews = (partFlag & VIEWS) == VIEWS;
@@ -464,7 +464,7 @@ bool saveJSON(const sfmData::SfMData& sfmData, const std::string& filename, ESfM
 bool loadJSON(sfmData::SfMData& sfmData, const std::string& filename, ESfMData partFlag, bool incompleteViews,
               EViewIdMethod viewIdMethod, const std::string& viewIdRegex)
 {
-  Vec3 version;
+  Version version;
 
   // load flags
   const bool loadViews = (partFlag & VIEWS) == VIEWS;
@@ -482,7 +482,11 @@ bool loadJSON(sfmData::SfMData& sfmData, const std::string& filename, ESfMData p
   bpt::read_json(filename, fileTree);
 
   // version
-  loadMatrix("version", version, fileTree);
+  {
+    Vec3i v;
+    loadMatrix("version", v, fileTree);
+    version = v;
+  }
 
   // folders
   if(fileTree.count("featuresFolders"))
diff --git a/src/aliceVision/version.hpp b/src/aliceVision/version.hpp
index df317bf9d0..509bcd0c14 100644
--- a/src/aliceVision/version.hpp
+++ b/src/aliceVision/version.hpp
@@ -26,17 +26,29 @@ namespace aliceVision {
 class Version
 {
 public:
-    Version(const Vec3 & v) : _v(v)
+    Version()
+        : _v(Vec3i::Zero())
+    {}
+
+    explicit Version(const Vec3i & v)
+        : _v(v)
     {
     }
-    
-    Version(int major, int minor, int micro) : _v(major, minor, micro)
+
+    Version(int major, int minor, int micro)
+        : _v(major, minor, micro)
+    {
+    }
+
+    Version& operator=(const Vec3i& other)
     {
+        _v = other;
+        return *this;
     }
 
     bool operator<(const Version& other) const
     {
-        for (Vec3::Index i = 0; i < 3; i++)
+        for (Vec3i::Index i = 0; i < 3; i++)
         {
             if (_v[i] < other._v[i])
             {
@@ -53,7 +65,7 @@ class Version
     }
 
 private:
-    Vec3 _v;
+    Vec3i _v;
 };
 
 }
\ No newline at end of file