diff --git a/src/output/pdf/mod.rs b/src/output/pdf/mod.rs
index 0bcf1fe..95278c3 100644
--- a/src/output/pdf/mod.rs
+++ b/src/output/pdf/mod.rs
@@ -14,7 +14,7 @@ fn pdf_result<T>(res: WKResult<T>) -> Result<T, String> {
 
 
 fn create_builder<'a>(config: Config, builder: &'a mut PdfBuilder) -> &'a mut PdfBuilder {
-    let mut safe_builder = builder.page_size(PageSize::A4).image_quality(100).title(&config.title);
+    let safe_builder = builder.page_size(PageSize::A4).image_quality(100).title(&config.title);
     unsafe {
         return safe_builder
             .global_setting("useCompression", "true")
diff --git a/src/processors/static_files.rs b/src/processors/static_files.rs
index 32ce8e9..03a87a7 100644
--- a/src/processors/static_files.rs
+++ b/src/processors/static_files.rs
@@ -1,12 +1,12 @@
-use html::{sciter_start, get_html, get_head, find_first};
+use html::{sciter_start, get_html, get_head};
 use sciter::Element;
 use config::Config;
 use assets;
 
 fn create_css_element(style: String) -> Element {
     let mut style_tag = Element::with_text("style", &style).unwrap();
-    style_tag.set_attribute("type", "text/css");
-    style_tag.set_attribute("media", "all");
+    style_tag.set_attribute("type", "text/css").expect(&format!("Failed to set CSS mimetype for {}", style));
+    style_tag.set_attribute("media", "all").expect(&format!("Failed to set CSS media type for {}", style));
     return style_tag;
 }
 
@@ -14,6 +14,6 @@ fn create_css_element(style: String) -> Element {
 pub fn static_files(_: Config, input: String) -> Result<String, String> {
     let mut root = sciter_start(input);
     let mut head = get_head(&mut root);
-    head.append(&create_css_element(assets::get("style.css")));
+    head.append(&create_css_element(assets::get("style.css"))).expect("Failed to inject CSS file");
     return Ok(get_html(root));
 }