diff --git a/Cargo.toml b/Cargo.toml
index ec19468..23964a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,4 +15,4 @@ log = "0.4.20"
 ostree = { version = "0.19.1", features = ["v2021_5"] }
 reqwest = { version = "0.11.22", features = ["json", "blocking"] }
 serde = { version = "1.0.188", features = ["derive"] }
-serde_json = "1.0.107"
+serde_json = { version = "1.0.107", features = ["raw_value"] }
diff --git a/src/review/diagnostics.rs b/src/review/diagnostics.rs
index c8d9b54..8b583ff 100644
--- a/src/review/diagnostics.rs
+++ b/src/review/diagnostics.rs
@@ -19,7 +19,7 @@ pub enum DiagnosticInfo {
     /// The appstream file is missing or couldn't be read.
     FailedToLoadAppstream { path: String, error: String },
     /// There is a problem in one of the appstream files.
-    FlatpakBuilderLint { stdout: String, stderr: String },
+    FlatpakBuilderLint { stdout: serde_json::value::Value, stderr: String },
     /// The app is FOSS, but a URL for the build's CI log was not given or is not a valid URL.
     MissingBuildLogUrl,
     /// A screenshot in appstream does not point to the flathub screenshot mirror.
diff --git a/src/review/validation.rs b/src/review/validation.rs
index db9212e..c7904a6 100644
--- a/src/review/validation.rs
+++ b/src/review/validation.rs
@@ -78,7 +78,7 @@ fn run_flatpak_builder_lint(refstring: &str) -> Result<Vec<ValidationDiagnostic>
     if !output.status.success() {
         Ok(vec![ValidationDiagnostic::new(
             DiagnosticInfo::FlatpakBuilderLint {
-                stdout: String::from_utf8_lossy(&output.stdout).to_string(),
+                stdout: serde_json::from_slice::<serde_json::Value>(&output.stdout).unwrap(),
                 stderr: String::from_utf8_lossy(&output.stderr).to_string(),
             },
             Some(refstring.to_string()),