diff --git a/NEWS.md b/NEWS.md
index e2e85e4c..db15ae62 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,8 @@
 # httr2 (development version)
 
+* `last_response_json()` now works with content-types that end with `+json`, 
+e.g., `application/problem+json` (@cgiachalis, #782).
+
 # httr2 1.2.2
 
 * httr2 will now emit OpenTelemetry traces for all requests when tracing is enabled. Requires the `otelsdk` package (@atheriel, #729).
diff --git a/R/last.R b/R/last.R
index 625d5d01..c57beb14 100644
--- a/R/last.R
+++ b/R/last.R
@@ -61,9 +61,12 @@ last_response_json <- function(pretty = TRUE) {
   if (is.null(resp)) {
     cli::cli_abort("No request has been made successfully yet.")
   }
-  if (!identical(resp_content_type(resp), "application/json")) {
-    cli::cli_abort("Last response doesn't have a JSON body.")
-  }
+  check_content_type(
+    resp_content_type(resp),
+    valid_types = "application/json",
+    valid_suffix = "json",
+    inform_check_type = TRUE
+  )
   httr2_json(resp_body_string(resp), pretty = pretty)
 }
 
diff --git a/tests/testthat/_snaps/last.md b/tests/testthat/_snaps/last.md
index a8da3918..90957b31 100644
--- a/tests/testthat/_snaps/last.md
+++ b/tests/testthat/_snaps/last.md
@@ -35,7 +35,8 @@
       last_response_json()
     Condition
       Error in `last_response_json()`:
-      ! Last response doesn't have a JSON body.
+      ! Unexpected content type "application/xml".
+      * Expecting type "application/json" or suffix "json".
 
 # useful errors if no last request/response