diff --git a/patches/bssl-update-apr23.diff b/patches/bssl-update-apr23.diff
new file mode 100644
index 0000000..edb9f80
--- /dev/null
+++ b/patches/bssl-update-apr23.diff
@@ -0,0 +1,68 @@
+diff --git a/src/x509/mod.rs b/src/x509/mod.rs
+index 45f2467..a03a8aa 100644
+--- a/src/x509/mod.rs
++++ b/src/x509/mod.rs
+@@ -893,13 +893,13 @@ impl X509NameBuilder {
+     pub fn append_entry_by_text(&mut self, field: &str, value: &str) -> Result<(), ErrorStack> {
+         unsafe {
+             let field = CString::new(field).unwrap();
+-            assert!(value.len() <= c_int::max_value() as usize);
++            assert!(value.len() <= isize::max_value() as usize);
+             cvt(ffi::X509_NAME_add_entry_by_txt(
+                 self.0.as_ptr(),
+                 field.as_ptr() as *mut _,
+                 ffi::MBSTRING_UTF8,
+                 value.as_ptr(),
+-                value.len() as c_int,
++                value.len() as isize,
+                 -1,
+                 0,
+             ))
+@@ -920,13 +920,13 @@ impl X509NameBuilder {
+     ) -> Result<(), ErrorStack> {
+         unsafe {
+             let field = CString::new(field).unwrap();
+-            assert!(value.len() <= c_int::max_value() as usize);
++            assert!(value.len() <= isize::max_value() as usize);
+             cvt(ffi::X509_NAME_add_entry_by_txt(
+                 self.0.as_ptr(),
+                 field.as_ptr() as *mut _,
+                 ty.as_raw(),
+                 value.as_ptr(),
+-                value.len() as c_int,
++                value.len() as isize,
+                 -1,
+                 0,
+             ))
+@@ -941,13 +941,13 @@ impl X509NameBuilder {
+     /// [`X509_NAME_add_entry_by_NID`]: https://www.openssl.org/docs/man1.1.0/crypto/X509_NAME_add_entry_by_NID.html
+     pub fn append_entry_by_nid(&mut self, field: Nid, value: &str) -> Result<(), ErrorStack> {
+         unsafe {
+-            assert!(value.len() <= c_int::max_value() as usize);
++            assert!(value.len() <= isize::max_value() as usize);
+             cvt(ffi::X509_NAME_add_entry_by_NID(
+                 self.0.as_ptr(),
+                 field.as_raw(),
+                 ffi::MBSTRING_UTF8,
+                 value.as_ptr() as *mut _,
+-                value.len() as c_int,
++                value.len() as isize,
+                 -1,
+                 0,
+             ))
+@@ -967,13 +967,13 @@ impl X509NameBuilder {
+         ty: Asn1Type,
+     ) -> Result<(), ErrorStack> {
+         unsafe {
+-            assert!(value.len() <= c_int::max_value() as usize);
++            assert!(value.len() <= isize::max_value() as usize);
+             cvt(ffi::X509_NAME_add_entry_by_NID(
+                 self.0.as_ptr(),
+                 field.as_raw(),
+                 ty.as_raw(),
+                 value.as_ptr() as *mut _,
+-                value.len() as c_int,
++                value.len() as isize,
+                 -1,
+                 0,
+             ))
diff --git a/src/x509/mod.rs b/src/x509/mod.rs
index 45f2467..a03a8aa 100644
--- a/src/x509/mod.rs
+++ b/src/x509/mod.rs
@@ -893,13 +893,13 @@
     pub fn append_entry_by_text(&mut self, field: &str, value: &str) -> Result<(), ErrorStack> {
         unsafe {
             let field = CString::new(field).unwrap();
-            assert!(value.len() <= c_int::max_value() as usize);
+            assert!(value.len() <= isize::max_value() as usize);
             cvt(ffi::X509_NAME_add_entry_by_txt(
                 self.0.as_ptr(),
                 field.as_ptr() as *mut _,
                 ffi::MBSTRING_UTF8,
                 value.as_ptr(),
-                value.len() as c_int,
+                value.len() as isize,
                 -1,
                 0,
             ))
@@ -920,13 +920,13 @@
     ) -> Result<(), ErrorStack> {
         unsafe {
             let field = CString::new(field).unwrap();
-            assert!(value.len() <= c_int::max_value() as usize);
+            assert!(value.len() <= isize::max_value() as usize);
             cvt(ffi::X509_NAME_add_entry_by_txt(
                 self.0.as_ptr(),
                 field.as_ptr() as *mut _,
                 ty.as_raw(),
                 value.as_ptr(),
-                value.len() as c_int,
+                value.len() as isize,
                 -1,
                 0,
             ))
@@ -941,13 +941,13 @@
     /// [`X509_NAME_add_entry_by_NID`]: https://www.openssl.org/docs/man1.1.0/crypto/X509_NAME_add_entry_by_NID.html
     pub fn append_entry_by_nid(&mut self, field: Nid, value: &str) -> Result<(), ErrorStack> {
         unsafe {
-            assert!(value.len() <= c_int::max_value() as usize);
+            assert!(value.len() <= isize::max_value() as usize);
             cvt(ffi::X509_NAME_add_entry_by_NID(
                 self.0.as_ptr(),
                 field.as_raw(),
                 ffi::MBSTRING_UTF8,
                 value.as_ptr() as *mut _,
-                value.len() as c_int,
+                value.len() as isize,
                 -1,
                 0,
             ))
@@ -967,13 +967,13 @@
         ty: Asn1Type,
     ) -> Result<(), ErrorStack> {
         unsafe {
-            assert!(value.len() <= c_int::max_value() as usize);
+            assert!(value.len() <= isize::max_value() as usize);
             cvt(ffi::X509_NAME_add_entry_by_NID(
                 self.0.as_ptr(),
                 field.as_raw(),
                 ty.as_raw(),
                 value.as_ptr() as *mut _,
-                value.len() as c_int,
+                value.len() as isize,
                 -1,
                 0,
             ))