diff --git a/blast/blastqueries.cpp b/blast/blastqueries.cpp
index 87f032c6..98d398aa 100644
--- a/blast/blastqueries.cpp
+++ b/blast/blastqueries.cpp
@@ -58,7 +58,7 @@ void BlastQueries::addQuery(BlastQuery * newQuery)
     newQuery->setName(getUniqueName(newQuery->getName()));
 
     //Give the new query a colour
-    int colourIndex = m_queries.size();
+    int colourIndex = int(m_queries.size());
     colourIndex %= presetColours.size();
     newQuery->setColour(presetColours[colourIndex]);
 
@@ -166,7 +166,7 @@ void BlastQueries::clearSearchResults()
 
 int BlastQueries::getQueryCount()
 {
-    return m_queries.size();
+    return int(m_queries.size());
 }
 
 int BlastQueries::getQueryCount(SequenceType sequenceType)
diff --git a/graph/assemblygraph.cpp b/graph/assemblygraph.cpp
index 0f956316..959a1078 100644
--- a/graph/assemblygraph.cpp
+++ b/graph/assemblygraph.cpp
@@ -1343,7 +1343,7 @@ void AssemblyGraph::setAllEdgesExactOverlap(int overlap)
 
 void AssemblyGraph::autoDetermineAllEdgesExactOverlap()
 {
-    int edgeCount = m_deBruijnGraphEdges.size();
+    int edgeCount = int(m_deBruijnGraphEdges.size());
     if (edgeCount == 0)
         return;
 
@@ -1377,7 +1377,7 @@ void AssemblyGraph::autoDetermineAllEdgesExactOverlap()
         {
             if (overlapCounts[i] > mostCommonOverlapCount)
             {
-                mostCommonOverlap = i;
+                mostCommonOverlap = int(i);
                 mostCommonOverlapCount = overlapCounts[i];
             }
         }