diff --git a/src/whisper_params.rs b/src/whisper_params.rs
index f0afb00..7e62c3b 100644
--- a/src/whisper_params.rs
+++ b/src/whisper_params.rs
@@ -1,6 +1,7 @@
 use crate::whisper_grammar::WhisperGrammarElement;
 use std::ffi::{c_char, c_float, c_int, CString};
 use std::marker::PhantomData;
+use std::sync::Arc;
 use whisper_rs_sys::whisper_token;
 
 #[derive(Debug, Clone)]
@@ -31,14 +32,15 @@ pub struct SegmentCallbackData {
 
 type SegmentCallbackFn = Box<dyn FnMut(SegmentCallbackData)>;
 
+#[derive(Clone)]
 pub struct FullParams<'a, 'b> {
     pub(crate) fp: whisper_rs_sys::whisper_full_params,
     phantom_lang: PhantomData<&'a str>,
     phantom_tokens: PhantomData<&'b [c_int]>,
     grammar: Option<Vec<whisper_rs_sys::whisper_grammar_element>>,
-    progess_callback_safe: Option<Box<dyn FnMut(i32)>>,
-    abort_callback_safe: Option<Box<dyn FnMut() -> bool>>,
-    segment_calllback_safe: Option<SegmentCallbackFn>,
+    progess_callback_safe: Option<Arc<Box<dyn FnMut(i32)>>>,
+    abort_callback_safe: Option<Arc<Box<dyn FnMut() -> bool>>>,
+    segment_calllback_safe: Option<Arc<SegmentCallbackFn>>,
 }
 
 impl<'a, 'b> FullParams<'a, 'b> {
@@ -588,7 +590,7 @@ impl<'a, 'b> FullParams<'a, 'b> {
                 self.fp.progress_callback = Some(trampoline::<F>);
                 self.fp.progress_callback_user_data = &mut closure as *mut F as *mut c_void;
                 // store the closure internally to make sure that the pointer above remains valid
-                self.progess_callback_safe = Some(Box::new(closure));
+                self.progess_callback_safe = Some(Arc::new(Box::new(closure)));
             }
             None => {
                 self.fp.progress_callback = None;