diff --git a/_ESRI/ArcGIS.Imagery.zmp/params.txt b/_ESRI/ArcGIS.Imagery.zmp/params.txt
index 96536f3bb..e06320463 100644
--- a/_ESRI/ArcGIS.Imagery.zmp/params.txt
+++ b/_ESRI/ArcGIS.Imagery.zmp/params.txt
@@ -8,7 +8,7 @@ NameInCache=ArcGIS.Imagery
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 DefURLBase=http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 Ext=.jpg
 projection=1
 sradiusa=6378137
diff --git a/_ESRI/ArcGIS.LightGrayCanvas.zmp/params.txt b/_ESRI/ArcGIS.LightGrayCanvas.zmp/params.txt
index 93bccc3c1..9b3d92b7a 100644
--- a/_ESRI/ArcGIS.LightGrayCanvas.zmp/params.txt
+++ b/_ESRI/ArcGIS.LightGrayCanvas.zmp/params.txt
@@ -8,7 +8,7 @@ NameInCache=ArcGIS.LightGrayCanvas
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 DefURLBase=http://server.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 Ext=.jpg
 projection=1
 sradiusa=6378137
diff --git a/_ESRI/ArcGIS.NatGeo.zmp/params.txt b/_ESRI/ArcGIS.NatGeo.zmp/params.txt
index 0a5d1603e..eeaac4bd0 100644
--- a/_ESRI/ArcGIS.NatGeo.zmp/params.txt
+++ b/_ESRI/ArcGIS.NatGeo.zmp/params.txt
@@ -8,7 +8,7 @@ NameInCache=ArcGIS.NatGeo
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 DefURLBase=http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 Ext=.jpg
 projection=1
 sradiusa=6378137
diff --git a/_ESRI/ArcGIS.Streets.zmp/params.txt b/_ESRI/ArcGIS.Streets.zmp/params.txt
index eca5324d7..ecf5b8cef 100644
--- a/_ESRI/ArcGIS.Streets.zmp/params.txt
+++ b/_ESRI/ArcGIS.Streets.zmp/params.txt
@@ -8,7 +8,7 @@ NameInCache=ArcGIS.Streets
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 DefURLBase=http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 Ext=.jpg
 projection=1
 sradiusa=6378137
diff --git a/_ESRI/ArcGIS.Terrain.zmp/params.txt b/_ESRI/ArcGIS.Terrain.zmp/params.txt
index a2014e9cc..9ea6c1fbb 100644
--- a/_ESRI/ArcGIS.Terrain.zmp/params.txt
+++ b/_ESRI/ArcGIS.Terrain.zmp/params.txt
@@ -8,7 +8,7 @@ NameInCache=ArcGIS.Terrain
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 DefURLBase=http://server.arcgisonline.com/ArcGIS/rest/services/World_Terrain_Base/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 Ext=.jpg
 projection=1
 sradiusa=6378137
diff --git a/_ESRI/Esri_Topo_maps.zmp/params.txt b/_ESRI/Esri_Topo_maps.zmp/params.txt
index a1741753e..8c4bb7b03 100644
--- a/_ESRI/Esri_Topo_maps.zmp/params.txt
+++ b/_ESRI/Esri_Topo_maps.zmp/params.txt
@@ -6,7 +6,7 @@ name=ESRI_Topo_Maps
 name_en=ESRI_Topo_Maps
 NameInCache=ESRI_Topo_Maps
 DefURLBase=http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 Ext=.jpg
diff --git a/_ESRI/USA_Topo_Maps.zmp/params.txt b/_ESRI/USA_Topo_Maps.zmp/params.txt
index 8a07a0178..17b3bf90e 100644
--- a/_ESRI/USA_Topo_Maps.zmp/params.txt
+++ b/_ESRI/USA_Topo_Maps.zmp/params.txt
@@ -6,7 +6,7 @@ name=USA_Topo_Maps
 name_en=USA_Topo_Maps
 NameInCache=USA_Topo_Maps
 DefURLBase=http://services.arcgisonline.com/ArcGIS/rest/services/USA_Topo_Maps/MapServer/tile/
-ContentType=image/jpg
+ContentType=image/jpeg
 ParentSubMenu=ESRI
 ParentSubMenu_en=ESRI
 Ext=.jpg