diff --git a/SAS/wilcoxonsr_HL.qmd b/SAS/wilcoxonsr_HL.qmd
index 7645e870..4f9c597c 100644
--- a/SAS/wilcoxonsr_HL.qmd
+++ b/SAS/wilcoxonsr_HL.qmd
@@ -25,7 +25,7 @@ run;
 ```
 
 ```{r, echo=FALSE, fig.align='center', out.width="75%"}
-knitr::include_graphics("../images/wilcoxonsr/wsr_data.png")
+knitr::include_graphics("../images/wilcoxonsr/wsr_data.PNG")
 ```
 
 ### Analysis in SAS {.unnumbered}
@@ -43,7 +43,7 @@ run;
 ```
 
 ```{r, echo=FALSE, fig.align='center', out.width="75%"}
-knitr::include_graphics("../images/wilcoxonsr/wsr_240.png")
+knitr::include_graphics("../images/wilcoxonsr/wsr_240.PNG")
 ```
 
 ### Important notes on SAS {.unnumbered}