diff --git a/pcbnew/exporters/gen_drill_report_files.cpp b/pcbnew/exporters/gen_drill_report_files.cpp
index faa16305d8..4ecda8c78a 100644
--- a/pcbnew/exporters/gen_drill_report_files.cpp
+++ b/pcbnew/exporters/gen_drill_report_files.cpp
@@ -305,22 +305,22 @@ bool GENDRILL_WRITER_BASE::genDrillMapFile( const wxString& aFullFileName, PLOT_
         plotter->SetCurrentLineWidth( -1 );
 
         // List the diameter of each drill in mm and inches.
-        sprintf( line, "%3.3fmm / %2.4f\" ", diameter_in_mm( tool.m_Diameter ),
+        snprintf( line, sizeof(line), "%3.3fmm / %2.4f\" ", diameter_in_mm( tool.m_Diameter ),
                  diameter_in_inches( tool.m_Diameter ) );
 
         msg = FROM_UTF8( line );
 
         // Now list how many holes and ovals are associated with each drill.
         if( ( tool.m_TotalCount == 1 ) && ( tool.m_OvalCount == 0 ) )
-            sprintf( line, "(1 hole)" );
+            snprintf( line, sizeof(line), "(1 hole)" );
         else if( tool.m_TotalCount == 1 ) // && ( toolm_OvalCount == 1 )
-            sprintf( line, "(1 slot)" );
+            snprintf( line, sizeof(line), "(1 slot)" );
         else if( tool.m_OvalCount == 0 )
-            sprintf( line, "(%d holes)", tool.m_TotalCount );
+            snprintf( line, sizeof(line), "(%d holes)", tool.m_TotalCount );
         else if( tool.m_OvalCount == 1 )
-            sprintf( line, "(%d holes + 1 slot)", tool.m_TotalCount - 1 );
+            snprintf( line, sizeof(line), "(%d holes + 1 slot)", tool.m_TotalCount - 1 );
         else // if ( toolm_OvalCount > 1 )
-            sprintf( line, "(%d holes + %d slots)", tool.m_TotalCount - tool.m_OvalCount,
+            snprintf( line, sizeof(line), "(%d holes + %d slots)", tool.m_TotalCount - tool.m_OvalCount,
                      tool.m_OvalCount );
 
         msg += FROM_UTF8( line );
diff --git a/pcbnew/exporters/place_file_exporter.cpp b/pcbnew/exporters/place_file_exporter.cpp
index 3c4f92c5ef..5e37bcf47c 100644
--- a/pcbnew/exporters/place_file_exporter.cpp
+++ b/pcbnew/exporters/place_file_exporter.cpp
@@ -167,7 +167,7 @@ std::string PLACE_FILE_EXPORTER::GenPositionData()
         wxChar csv_sep = ',';
 
         // Set first line:;
-        sprintf( line, "Ref%cVal%cPackage%cPosX%cPosY%cRot%cSide\n",
+        snprintf( line, sizeof(line), "Ref%cVal%cPackage%cPosX%cPosY%cRot%cSide\n",
                  csv_sep, csv_sep, csv_sep, csv_sep, csv_sep, csv_sep );
 
         buffer += line;
@@ -211,12 +211,12 @@ std::string PLACE_FILE_EXPORTER::GenPositionData()
     else
     {
         // Write file header
-        sprintf( line, "### Footprint positions - created on %s ###\n", TO_UTF8( DateAndTime() ) );
+        snprintf( line, sizeof(line), "### Footprint positions - created on %s ###\n", TO_UTF8( DateAndTime() ) );
 
         buffer += line;
 
         wxString Title = GetBuildVersion();
-        sprintf( line, "### Printed by KiCad version %s\n", TO_UTF8( Title ) );
+        snprintf( line, sizeof(line), "### Printed by KiCad version %s\n", TO_UTF8( Title ) );
         buffer += line;
 
         buffer +=  unit_text;
@@ -233,7 +233,7 @@ std::string PLACE_FILE_EXPORTER::GenPositionData()
 
         buffer += "\n";
 
-        sprintf(line, "%-*s  %-*s  %-*s  %9.9s  %9.9s  %8.8s  %s\n",
+        snprintf(line, sizeof(line), "%-*s  %-*s  %-*s  %9.9s  %9.9s  %8.8s  %s\n",
                 int(lenRefText), "# Ref",
                 int(lenValText), "Val",
                 int(lenPkgText), "Package",
@@ -258,7 +258,7 @@ std::string PLACE_FILE_EXPORTER::GenPositionData()
             ref.Replace( wxT( " " ), wxT( "_" ) );
             val.Replace( wxT( " " ), wxT( "_" ) );
             pkg.Replace( wxT( " " ), wxT( "_" ) );
-            sprintf(line, "%-*s  %-*s  %-*s  %9.4f  %9.4f  %8.4f  %s\n",
+            snprintf(line, sizeof(line), "%-*s  %-*s  %-*s  %9.4f  %9.4f  %8.4f  %s\n",
                     lenRefText, TO_UTF8( ref ),
                     lenValText, TO_UTF8( val ),
                     lenPkgText, TO_UTF8( pkg ),
@@ -293,11 +293,11 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
 
     // Generate header file comments.)
     char line[1024];
-    sprintf( line, "## Footprint report - date %s\n", TO_UTF8( DateAndTime() ) );
+    snprintf( line, sizeof(line), "## Footprint report - date %s\n", TO_UTF8( DateAndTime() ) );
     buffer += line;
 
     wxString Title = GetBuildVersion();
-    sprintf( line, "## Created by KiCad version %s\n", TO_UTF8( Title ) );
+    snprintf( line, sizeof(line), "## Created by KiCad version %s\n", TO_UTF8( Title ) );
     buffer += line;
 
     buffer += unit_text;
@@ -308,11 +308,11 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
 
     buffer += "\n$BOARD\n";
 
-    sprintf( line, "upper_left_corner %9.6f %9.6f\n",
+    snprintf( line, sizeof(line), "upper_left_corner %9.6f %9.6f\n",
              bbbox.GetX() * conv_unit, bbbox.GetY() * conv_unit );
     buffer += line;
 
-    sprintf( line, "lower_right_corner %9.6f %9.6f\n",
+    snprintf( line, sizeof(line), "lower_right_corner %9.6f %9.6f\n",
              bbbox.GetRight()  * conv_unit, bbbox.GetBottom() * conv_unit );
     buffer += line;
 
@@ -333,12 +333,12 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
     {
         wxString ref = footprint->Reference().GetShownText();
 
-        sprintf( line, "$MODULE %s\n", TO_UTF8( ref ) );
+        snprintf( line, sizeof(line), "$MODULE %s\n", TO_UTF8( ref ) );
         buffer += line;
 
-        sprintf( line, "reference %s\n", TO_UTF8( ref ) );
-        sprintf( line, "value %s\n", EscapedUTF8( footprint->Value().GetShownText() ).c_str() );
-        sprintf( line, "footprint %s\n", footprint->GetFPID().Format().c_str() );
+        snprintf( line, sizeof(line), "reference %s\n", TO_UTF8( ref ) );
+        snprintf( line, sizeof(line), "value %s\n", EscapedUTF8( footprint->Value().GetShownText() ).c_str() );
+        snprintf( line, sizeof(line), "footprint %s\n", footprint->GetFPID().Format().c_str() );
         buffer += line;
 
         buffer += "attribut";
@@ -357,7 +357,7 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
         VECTOR2I footprint_pos = footprint->GetPosition();
         footprint_pos -= m_place_Offset;
 
-        sprintf( line, "position %9.6f %9.6f  orientation %.2f\n",
+        snprintf( line, sizeof(line), "position %9.6f %9.6f  orientation %.2f\n",
                  footprint_pos.x * conv_unit,
                  footprint_pos.y * conv_unit,
                  footprint->GetOrientation().AsDegrees() );
@@ -383,7 +383,7 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
 
         for( PAD* pad : sortedPads )
         {
-            sprintf( line, "$PAD \"%s\"\n", TO_UTF8( pad->GetNumber() ) );
+            snprintf( line, sizeof(line), "$PAD \"%s\"\n", TO_UTF8( pad->GetNumber() ) );
             buffer += line;
 
             int layer = 0;
@@ -395,12 +395,12 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
                 layer |= 2;
 
             static const char* layer_name[4] = { "nocopper", "back", "front", "both" };
-            sprintf( line, "Shape %s Layer %s\n",
+            snprintf( line, sizeof(line), "Shape %s Layer %s\n",
                      TO_UTF8( pad->ShowPadShape() ),
                      layer_name[layer] );
             buffer += line;
 
-            sprintf( line, "position %9.6f %9.6f  size %9.6f %9.6f  orientation %.2f\n",
+            snprintf( line, sizeof(line), "position %9.6f %9.6f  size %9.6f %9.6f  orientation %.2f\n",
                      pad->GetPos0().x * conv_unit,
                      pad->GetPos0().y * conv_unit,
                      pad->GetSize().x * conv_unit,
@@ -408,10 +408,10 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
                      ( pad->GetOrientation() - footprint->GetOrientation() ).AsDegrees() );
             buffer += line;
 
-            sprintf( line, "drill %9.6f\n", pad->GetDrillSize().x * conv_unit );
+            snprintf( line, sizeof(line), "drill %9.6f\n", pad->GetDrillSize().x * conv_unit );
             buffer += line;
 
-            sprintf( line, "shape_offset %9.6f %9.6f\n",
+            snprintf( line, sizeof(line), "shape_offset %9.6f %9.6f\n",
                      pad->GetOffset().x * conv_unit,
                      pad->GetOffset().y * conv_unit );
             buffer += line;
@@ -419,7 +419,7 @@ std::string PLACE_FILE_EXPORTER::GenReportData()
             buffer += "$EndPAD\n";
         }
 
-        sprintf( line, "$EndMODULE  %s\n\n", TO_UTF8( ref ) );
+        snprintf( line, sizeof(line), "$EndMODULE  %s\n\n", TO_UTF8( ref ) );
         buffer += line;
     }
 
diff --git a/pcbnew/files.cpp b/pcbnew/files.cpp
index 6da3c98733..1b256af8c5 100644
--- a/pcbnew/files.cpp
+++ b/pcbnew/files.cpp
@@ -722,8 +722,8 @@ bool PCB_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
             char        ybuf[30];
 
             // EAGLE_PLUGIN can use this info to center the BOARD, but it does not yet.
-            sprintf( xbuf, "%d", GetPageSizeIU().x );
-            sprintf( ybuf, "%d", GetPageSizeIU().y );
+            snprintf( xbuf, sizeof(xbuf), "%d", GetPageSizeIU().x );
+            snprintf( ybuf, sizeof(ybuf), "%d", GetPageSizeIU().y );
 
             props["page_width"]  = xbuf;
             props["page_height"] = ybuf;
diff --git a/pcbnew/plugins/legacy/legacy_plugin.cpp b/pcbnew/plugins/legacy/legacy_plugin.cpp
index db69ca89ef..b8a8bfcfe0 100644
--- a/pcbnew/plugins/legacy/legacy_plugin.cpp
+++ b/pcbnew/plugins/legacy/legacy_plugin.cpp
@@ -3111,7 +3111,7 @@ void LP_CACHE::LoadModules( LINE_READER* aReader )
                     std::string newName = footprintName;
 
                     newName += "_v";
-                    sprintf( buf, "%d", version++ );
+                    snprintf( buf, sizeof(buf), "%d", version++ );
                     newName += buf;
 
                     it = m_footprints.find( newName );
diff --git a/pcbnew/tools/pcb_control.cpp b/pcbnew/tools/pcb_control.cpp
index 0c038b64d0..7494ab067d 100644
--- a/pcbnew/tools/pcb_control.cpp
+++ b/pcbnew/tools/pcb_control.cpp
@@ -1255,8 +1255,8 @@ int PCB_CONTROL::AppendBoard( PLUGIN& pi, wxString& fileName )
         char        ybuf[30];
 
         // EAGLE_PLUGIN can use this info to center the BOARD, but it does not yet.
-        sprintf( xbuf, "%d", editFrame->GetPageSizeIU().x );
-        sprintf( ybuf, "%d", editFrame->GetPageSizeIU().y );
+        snprintf( xbuf, sizeof(xbuf), "%d", editFrame->GetPageSizeIU().x );
+        snprintf( ybuf, sizeof(ybuf), "%d", editFrame->GetPageSizeIU().y );
 
         props["page_width"]  = xbuf;
         props["page_height"] = ybuf;