diff --git a/r/2018-01-29-hover-text-and-formatting.Rmd b/r/2018-01-29-hover-text-and-formatting.Rmd
index f7cfa4e0..fe2508f5 100644
--- a/r/2018-01-29-hover-text-and-formatting.Rmd
+++ b/r/2018-01-29-hover-text-and-formatting.Rmd
@@ -3,7 +3,7 @@ name: Hover Text and Formatting
 permalink: r/hover-text-and-formatting/
 description: How to use hover text and formatting in R with Plotly.
 layout: base
-thumbnail: thumbnail/hover-text.jpg
+thumbnail: thumbnail/hover-text.png
 language: r
 display_as: file_settings
 order: 7
diff --git a/r/2018-11-22-3d-surface-lighting.Rmd b/r/2018-11-22-3d-surface-lighting.Rmd
index 1eb8c6c2..3f0e78a0 100644
--- a/r/2018-11-22-3d-surface-lighting.Rmd
+++ b/r/2018-11-22-3d-surface-lighting.Rmd
@@ -3,7 +3,7 @@ description: How to add lighting effects in 3D R Plots.
 display_as: file_settings
 language: r
 layout: base
-name: 3D Surface Lighting in R
+name: 3D Surface Lighting
 order: 9
 output:
   html_document: