diff --git a/src/epub.rs b/src/epub.rs
index dddd111..221684d 100644
--- a/src/epub.rs
+++ b/src/epub.rs
@@ -13,6 +13,7 @@ use std::io;
 use std::io::Read;
 use std::path::Path;
 use std::str::FromStr;
+use upon::Engine;
 
 /// Represents the EPUB version.
 ///
@@ -720,8 +721,8 @@ impl<Z: Zip> EpubBuilder<Z> {
 
         let mut res: Vec<u8> = vec![];
         match self.version {
-            EpubVersion::V20 => templates::v2::CONTENT_OPF.render(&data).to_writer(&mut res),
-            EpubVersion::V30 => templates::v3::CONTENT_OPF.render(&data).to_writer(&mut res),
+            EpubVersion::V20 => templates::v2::CONTENT_OPF.render(&Engine::new(), &data).to_writer(&mut res),
+            EpubVersion::V30 => templates::v3::CONTENT_OPF.render(&Engine::new(), &data).to_writer(&mut res),
         }
         .map_err(|e| crate::Error::TemplateError {
             msg: "could not render template for content.opf".to_string(),
@@ -812,8 +813,8 @@ impl<Z: Zip> EpubBuilder<Z> {
 
         let mut res: Vec<u8> = vec![];
         match self.version {
-            EpubVersion::V20 => templates::v2::NAV_XHTML.render(&data).to_writer(&mut res),
-            EpubVersion::V30 => templates::v3::NAV_XHTML.render(&data).to_writer(&mut res),
+            EpubVersion::V20 => templates::v2::NAV_XHTML.render(&Engine::new(), &data).to_writer(&mut res),
+            EpubVersion::V30 => templates::v3::NAV_XHTML.render(&Engine::new(), &data).to_writer(&mut res),
         }
         .map_err(|e| crate::Error::TemplateError {
             msg: "error rendering nav.xhtml template".to_string(),
diff --git a/src/zip_library.rs b/src/zip_library.rs
index f6e045c..f75ba0f 100644
--- a/src/zip_library.rs
+++ b/src/zip_library.rs
@@ -12,7 +12,6 @@ use std::io::Write;
 use std::path::Path;
 
 use crate::Result;
-use libzip::write::FileOptions;
 use libzip::CompressionMethod;
 use libzip::ZipWriter;
 
@@ -43,7 +42,7 @@ impl ZipLibrary {
         writer.set_comment(""); // Fix issues with some readers
         writer.start_file(
             "mimetype",
-            FileOptions::default().compression_method(CompressionMethod::Stored),
+            libzip::write::SimpleFileOptions::default().compression_method(CompressionMethod::Stored),
         )?;
         writer
             .write(b"application/epub+zip")
@@ -63,7 +62,7 @@ impl Zip for ZipLibrary {
             // Path names should not use backspaces in zip files
             file = file.replace('\\', "/");
         }
-        let options = FileOptions::default();
+        let options = libzip::write::SimpleFileOptions::default();
         self.writer.start_file(file.clone(), options).map_err(|e| {
             crate::Error::ZipErrorWithMessage {
                 msg: format!("could not create file '{}' in epub", file),
@@ -77,7 +76,7 @@ impl Zip for ZipLibrary {
         Ok(())
     }
 
-    fn generate<W: Write>(&mut self, mut to: W) -> Result<()> {
+    fn generate<W: Write>(self, mut to: W) -> Result<()> {
         let cursor = self
             .writer
             .finish()