diff --git a/Cargo.toml b/Cargo.toml
index 7726016..fb4469c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ license = "GPL-3.0"
 edition = "2024"
 keywords = ["lisp", "scripting", "emacs-lisp"]
 categories = ["compilers", "config"]
+rust-version = "1.88.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/README.md b/README.md
index 15b855e..958cb10 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ already familiar with Emacs Lisp, there's no need to learn an extra language.
 
 ## Getting started
 
-Tulisp requires `rustc` version 1.70 or higher.
+Tulisp requires `rustc` version 1.88 or higher.
 
 It is very easy to get started.  Here's an example:
 
diff --git a/src/builtin/functions/errors.rs b/src/builtin/functions/errors.rs
index 3560a70..9d11bc4 100644
--- a/src/builtin/functions/errors.rs
+++ b/src/builtin/functions/errors.rs
@@ -34,7 +34,11 @@ mod tests {
     #[test]
     fn test_error_handling() {
         let mut ctx = TulispContext::new();
-        eval_assert_equal(&mut ctx, "(catch 'my-tag (throw 'my-tag 42))", "42");
+        eval_assert_equal(
+            &mut ctx,
+            "(catch 'my-tag (setq x 42) (throw 'my-tag x))",
+            "42",
+        );
         eval_assert_error(
             &mut ctx,
             "(catch 'my-tag (throw 'other-tag 42))",
diff --git a/src/builtin/mod.rs b/src/builtin/mod.rs
index fa1e8e8..36cd407 100644
--- a/src/builtin/mod.rs
+++ b/src/builtin/mod.rs
@@ -171,6 +171,14 @@ the unix epoch.
 | `sqrt`      | ☑️      |        |
 | `abs`       | ☑️      |        |
 
+## Error handling
+
+| Name                                                                                                   | Status | Details |
+|--------------------------------------------------------------------------------------------------------|--------|---------|
+| [`error`](https://www.gnu.org/software/emacs/manual/html_node/elisp/Signaling-Errors.html#index-error) | ☑️      |         |
+| [`throw`](https://www.gnu.org/software/emacs/manual/html_node/elisp/Catch-and-Throw.html#index-throw)  | ☑️      |         |
+| [`catch`](https://www.gnu.org/software/emacs/manual/html_node/elisp/Catch-and-Throw.html#index-catch)  | ☑️      |         |
+
 ## Others
 
 These functions need to be organized into categories.  They are grouped here for now.
diff --git a/src/lib.rs b/src/lib.rs
index c5ce973..aee95a8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,7 +10,7 @@ already familiar with Emacs Lisp, there's no need to learn an extra language.
 
 ## Getting started
 
-Tulisp requires `rustc` version 1.70 or higher.
+Tulisp requires `rustc` version 1.88 or higher.
 
 It is very easy to get started.  Here's an example:
 */