diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 015cf140..dcf40fd8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ on:
     types: [checks_requested]
 
 env:
-  RUST_VERSION: "1.70"
+  RUST_VERSION: "1.77"
   CMAKE_GENERATOR: Ninja
 
 jobs:
diff --git a/Cargo.lock b/Cargo.lock
index 2b10b59f..2d3be1bf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -95,7 +95,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chewing"
-version = "0.8.5"
+version = "0.9.0-alpha.1"
 dependencies = [
  "der",
  "directories",
@@ -106,7 +106,7 @@ dependencies = [
 
 [[package]]
 name = "chewing-cli"
-version = "0.8.5"
+version = "0.9.0-alpha.1"
 dependencies = [
  "anyhow",
  "chewing",
@@ -116,7 +116,7 @@ dependencies = [
 
 [[package]]
 name = "chewing_capi"
-version = "0.8.5"
+version = "0.9.0-alpha.1"
 dependencies = [
  "chewing",
  "env_logger",
diff --git a/Cargo.toml b/Cargo.toml
index 86773937..cbddd160 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,8 +3,8 @@ name = "chewing"
 description = "The Chewing (酷音) intelligent Zhuyin input method."
 documentation = "https://docs.rs/chewing"
 license = "LGPL-2.1-or-later"
-version = "0.8.5"
-rust-version = "1.70"
+version = "0.9.0-alpha.1"
+rust-version = "1.77.0"
 edition = "2021"
 
 include = [
diff --git a/README.md b/README.md
index 9cd2a97a..63f9a35d 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ be built.
    - cmake >= 3.21.0
 + Toolchain / IDE:
    - clang >= 3.2 OR gcc >= 4.6.3
-   - Rust >= 1.70
+   - Rust >= 1.77
    - Build Tools for Visual Studio 2022 for MSVC build
 + Documentation tools:
    - texinfo >= 4.8
@@ -185,7 +185,7 @@ To ensure libchewing can be built on various Linux distributions, we use the
 minimum rust version available from major distributions' next release branch.
 Data source: https://repology.org/project/rust/versions
 
-* Current MSRV: 1.70.0 (Debian unstable)
+* Current MSRV: 1.77.0 (Debian unstable)
 
 
 ## Usage
diff --git a/capi/Cargo.toml b/capi/Cargo.toml
index 9a7c69fa..14834add 100644
--- a/capi/Cargo.toml
+++ b/capi/Cargo.toml
@@ -2,15 +2,15 @@
 name = "chewing_capi"
 description = "The Chewing (酷音) intelligent Zhuyin input method."
 license = "LGPL-2.1-or-later"
-version = "0.8.5"
-rust-version = "1.70"
+version = "0.9.0-alpha.1"
+rust-version = "1.77"
 edition = "2021"
 
 [lib]
 crate-type = ["rlib", "staticlib"]
 
 [dependencies]
-chewing = { version = "0.8.5", path = ".." }
+chewing = { version = "0.9.0-alpha.1", path = ".." }
 env_logger = { version = ">= 0.10.2", default-features = false }
 log = { workspace = true }
 
diff --git a/capi/src/io.rs b/capi/src/io.rs
index a352c577..274899c0 100644
--- a/capi/src/io.rs
+++ b/capi/src/io.rs
@@ -303,7 +303,7 @@ pub unsafe extern "C" fn chewing_config_has_option(
         | "chewing.selection_keys"
         | "chewing.character_form"
         | "chewing.space_is_select_key"
-        | "chewing.fuzzy_searcy_mode" => true,
+        | "chewing.fuzzy_search_mode" => true,
         _ => false,
     };
 
diff --git a/capi/src/lib.rs b/capi/src/lib.rs
index 768cec09..c42b3acd 100644
--- a/capi/src/lib.rs
+++ b/capi/src/lib.rs
@@ -33,6 +33,8 @@ mod io;
 mod logger;
 mod public;
 
+pub mod version;
+
 /// Initializes chewing context and environment settings.
 ///
 /// Most of the Chewing IM APIs require a
diff --git a/capi/src/symbols-elf.map b/capi/src/symbols-elf.map
index 8fd268f8..b60033c3 100644
--- a/capi/src/symbols-elf.map
+++ b/capi/src/symbols-elf.map
@@ -128,4 +128,9 @@ CHEWING_0.9 {
         chewing_config_get_int;
         chewing_config_set_str;
         chewing_config_get_str;
+        chewing_version;
+        chewing_version_major;
+        chewing_version_minor;
+        chewing_version_patch;
+        chewing_version_extra;
 } CHEWING_0.5;
\ No newline at end of file
diff --git a/capi/src/symbols-mach_o.map b/capi/src/symbols-mach_o.map
index f795cfef..d5ae7f5c 100644
--- a/capi/src/symbols-mach_o.map
+++ b/capi/src/symbols-mach_o.map
@@ -120,4 +120,9 @@ _chewing_config_has_option
 _chewing_config_set_int
 _chewing_config_get_int
 _chewing_config_set_str
-_chewing_config_get_str
\ No newline at end of file
+_chewing_config_get_str
+_chewing_version
+_chewing_version_major
+_chewing_version_minor
+_chewing_version_patch
+_chewing_version_extra
\ No newline at end of file
diff --git a/capi/src/symbols-msvc.def b/capi/src/symbols-msvc.def
index c1bc4510..230e20cc 100644
--- a/capi/src/symbols-msvc.def
+++ b/capi/src/symbols-msvc.def
@@ -121,4 +121,9 @@ EXPORTS
     chewing_config_set_int;
     chewing_config_get_int;
     chewing_config_set_str;
-    chewing_config_get_str;
\ No newline at end of file
+    chewing_config_get_str;
+    chewing_version;
+    chewing_version_major;
+    chewing_version_minor;
+    chewing_version_patch;
+    chewing_version_extra;
\ No newline at end of file
diff --git a/capi/src/version.rs b/capi/src/version.rs
new file mode 100644
index 00000000..a2485019
--- /dev/null
+++ b/capi/src/version.rs
@@ -0,0 +1,26 @@
+use std::ffi::{c_char, c_int};
+
+#[no_mangle]
+pub extern "C" fn chewing_version() -> *const c_char {
+    c"0.9.0-alpha.1".as_ptr()
+}
+
+#[no_mangle]
+pub extern "C" fn chewing_version_major() -> c_int {
+    0
+}
+
+#[no_mangle]
+pub extern "C" fn chewing_version_minor() -> c_int {
+    9
+}
+
+#[no_mangle]
+pub extern "C" fn chewing_version_patch() -> c_int {
+    0
+}
+
+#[no_mangle]
+pub extern "C" fn chewing_version_extra() -> *const c_char {
+    c"-alpha.1".as_ptr()
+}
diff --git a/fuzzer/Cargo.toml b/fuzzer/Cargo.toml
index 2a42586b..ab240598 100644
--- a/fuzzer/Cargo.toml
+++ b/fuzzer/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-chewing = { version = "0.8.5", path = ".." }
-chewing_capi = { version = "0.8.5", path = "../capi" }
+chewing = { version = "0.9.0-alpha.1", path = ".." }
+chewing_capi = { version = "0.9.0-alpha.1", path = "../capi" }
 log = "0.4.21"
 env_logger = { version = ">= 0.10.2", default-features = false }
diff --git a/include/chewing.h b/include/chewing.h
index d9e5b27f..646b0a3b 100644
--- a/include/chewing.h
+++ b/include/chewing.h
@@ -1080,6 +1080,16 @@ void chewing_set_hsuSelKeyType(struct ChewingContext *_ctx, int mode);
  */
 int chewing_get_hsuSelKeyType(struct ChewingContext *_ctx);
 
+const char *chewing_version(void);
+
+int chewing_version_major(void);
+
+int chewing_version_minor(void);
+
+int chewing_version_patch(void);
+
+const char *chewing_version_extra(void);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif  // __cplusplus
diff --git a/tests/test-config.c b/tests/test-config.c
index 5ac3b506..5c7a171f 100644
--- a/tests/test-config.c
+++ b/tests/test-config.c
@@ -8,6 +8,7 @@
  * of this file.
  */
 
+#include <stdio.h>
 #ifdef HAVE_CONFIG_H
 #    include <config.h>
 #endif
@@ -53,6 +54,7 @@ void test_has_option()
         ,"chewing.selection_keys"
         ,"chewing.character_form"
         ,"chewing.space_is_select_key"
+        ,"chewing.fuzzy_search_mode"
     };
 
     ctx = chewing_new();
@@ -161,6 +163,9 @@ void test_default_value_options()
     ok(chewing_config_get_int(ctx, "chewing.character_form") == HALFSHAPE_MODE,
         "default chewing.character_form shall be %d", HALFSHAPE_MODE);
 
+    ok(chewing_config_get_int(ctx, "chewing.fuzzy_search_mode") == 0,
+        "default chewing.fuzzy_search_mode shall be 0");
+
     chewing_delete(ctx);
 }
 
@@ -722,6 +727,21 @@ void test_new2()
     test_new2_userpath();
 }
 
+void test_runtime_version()
+{
+    char buf[256];
+    int major = chewing_version_major();
+    int minor = chewing_version_minor();
+    int patch = chewing_version_patch();
+    const char *extra = chewing_version_extra();
+    const char *version = chewing_version();
+
+    ok(version != NULL, "chewing_version returns a version string");
+
+    sprintf(buf, "%d.%d.%d%s", major, minor, patch, extra);
+    ok(strcmp(buf, version) == 0, "chewing_version can be created from components");
+}
+
 int main(int argc, char *argv[])
 {
     char *logname;
@@ -760,6 +780,8 @@ int main(int argc, char *argv[])
 
     test_new2();
 
+    test_runtime_version();
+
     fclose(fd);
 
     return exit_status();
diff --git a/tests/testhelper/Cargo.toml b/tests/testhelper/Cargo.toml
index 6e9cbe22..76253c2d 100644
--- a/tests/testhelper/Cargo.toml
+++ b/tests/testhelper/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-chewing = { version = "0.8.5", path = "../.." }
+chewing = { version = "0.9.0-alpha.1", path = "../.." }
 
 [features]
 sqlite = ["chewing/sqlite"]
diff --git a/tools/Cargo.toml b/tools/Cargo.toml
index dc4efc7a..fccda425 100644
--- a/tools/Cargo.toml
+++ b/tools/Cargo.toml
@@ -2,12 +2,12 @@
 name = "chewing-cli"
 description = "Tools of the Chewing (酷音) intelligent Zhuyin input method."
 license = "LGPL-2.1-or-later"
-version = "0.8.5"
+version = "0.9.0-alpha.1"
 edition = "2021"
 
 [dependencies]
 anyhow = "1.0.0"
-chewing = { version = "0.8.5", path = "..", features = ["sqlite"] }
+chewing = { version = "0.9.0-alpha.1", path = "..", features = ["sqlite"] }
 clap = { version = "4.4.18", features = ["derive"] }
 clap_mangen = { version = "0.2.12", optional = true }