diff --git a/R/render-har.r b/R/render-har.r
index eac1693..34fa1d9 100644
--- a/R/render-har.r
+++ b/R/render-har.r
@@ -40,7 +40,7 @@ render_har <- function(splash_obj = splash_local, url, base_url, response_body=F
     res <- httr::GET(splash_url(splash_obj), path="render.har", encode="json", query=params)
   } else {
     res <- httr::GET(
-      splash_url(splash_obj), path="render.html", encode="json", query=params,
+      splash_url(splash_obj), path="render.har", encode="json", query=params,
       httr::authenticate(splash_obj$user, splash_obj$pass)
     )
   }
diff --git a/R/render-jpg.r b/R/render-jpg.r
index cd73a12..88efc15 100644
--- a/R/render-jpg.r
+++ b/R/render-jpg.r
@@ -46,7 +46,7 @@ render_jpeg <- render_jpg <- function(
     res <- httr::GET(splash_url(splash_obj), path="render.jpeg", encode="json", query=params)
   } else {
     res <- httr::GET(
-      splash_url(splash_obj), path="render.html", encode="json", query=params,
+      splash_url(splash_obj), path="render.jpeg", encode="json", query=params,
       httr::authenticate(splash_obj$user, splash_obj$pass)
     )
   }
diff --git a/R/render-json.r b/R/render-json.r
index 7e91bbf..f21b827 100644
--- a/R/render-json.r
+++ b/R/render-json.r
@@ -64,7 +64,14 @@ render_json <- function(splash_obj = splash_local, url, base_url=NULL, quality=7
   if (!missing(save_args)) params$save_args <- jsonlite::unbox(save_args)
   if (!missing(load_args)) params$load_args <- jsonlite::unbox(load_args)
 
-  res <- httr::GET(splash_url(splash_obj), path="render.json", encode="json", query=params)
+  if (is.null(splash_obj$user)) {
+    res <- httr::GET(splash_url(splash_obj), path="render.json", encode="json", query=params)
+  } else {
+    res <- httr::GET(
+      splash_url(splash_obj), path="render.json", encode="json", query=params,
+      httr::authenticate(splash_obj$user, splash_obj$pass)
+    )
+  }
 
   httr::stop_for_status(res)
 
diff --git a/R/render-png.r b/R/render-png.r
index 8d9af81..ec54f24 100644
--- a/R/render-png.r
+++ b/R/render-png.r
@@ -51,7 +51,7 @@ render_png <- function(
     res <- httr::GET(splash_url(splash_obj), path="render.png", encode="json", query=params)
   } else {
     res <- httr::GET(
-      splash_url(splash_obj), path="render.html", encode="json", query=params,
+      splash_url(splash_obj), path="render.png", encode="json", query=params,
       httr::authenticate(splash_obj$user, splash_obj$pass)
     )
   }
diff --git a/README.Rmd b/README.Rmd
index 6f644ad..486a523 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -119,6 +119,8 @@ Suggest more in a feature req!
 ### Installation
 
 ```{r eval=FALSE}
+devtools::install_git("https://gitlab.com/hrbrmstr/splashr.git")
+# or
 devtools::install_github("hrbrmstr/splashr")
 ```