diff --git a/crates/base_db/Cargo.toml b/crates/base_db/Cargo.toml
index de88617464..20a4b111e3 100644
--- a/crates/base_db/Cargo.toml
+++ b/crates/base_db/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/cfg/Cargo.toml b/crates/cfg/Cargo.toml
index 6d4ff45b18..df652c41d8 100644
--- a/crates/cfg/Cargo.toml
+++ b/crates/cfg/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/flycheck/Cargo.toml b/crates/flycheck/Cargo.toml
index 2b95ded2ac..929089a9e2 100644
--- a/crates/flycheck/Cargo.toml
+++ b/crates/flycheck/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/hir/Cargo.toml b/crates/hir/Cargo.toml
index c80605c16c..316167d7e1 100644
--- a/crates/hir/Cargo.toml
+++ b/crates/hir/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/hir_def/Cargo.toml b/crates/hir_def/Cargo.toml
index bdfad530b0..3261577df0 100644
--- a/crates/hir_def/Cargo.toml
+++ b/crates/hir_def/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/hir_expand/Cargo.toml b/crates/hir_expand/Cargo.toml
index 520c2208d6..f17e1e857b 100644
--- a/crates/hir_expand/Cargo.toml
+++ b/crates/hir_expand/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/hir_ty/Cargo.toml b/crates/hir_ty/Cargo.toml
index fcb2e1d2e9..14ef3e52ce 100644
--- a/crates/hir_ty/Cargo.toml
+++ b/crates/hir_ty/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide/Cargo.toml b/crates/ide/Cargo.toml
index 62043b82ad..aef8e367f2 100644
--- a/crates/ide/Cargo.toml
+++ b/crates/ide/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide_assists/Cargo.toml b/crates/ide_assists/Cargo.toml
index f9f9b3936f..de5dd6cb79 100644
--- a/crates/ide_assists/Cargo.toml
+++ b/crates/ide_assists/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide_completion/Cargo.toml b/crates/ide_completion/Cargo.toml
index 27abf77938..8ade88fdd1 100644
--- a/crates/ide_completion/Cargo.toml
+++ b/crates/ide_completion/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide_db/Cargo.toml b/crates/ide_db/Cargo.toml
index 754b6f1a09..d6586185c5 100644
--- a/crates/ide_db/Cargo.toml
+++ b/crates/ide_db/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide_diagnostics/Cargo.toml b/crates/ide_diagnostics/Cargo.toml
index adb3c2f72f..160293c7da 100644
--- a/crates/ide_diagnostics/Cargo.toml
+++ b/crates/ide_diagnostics/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/ide_ssr/Cargo.toml b/crates/ide_ssr/Cargo.toml
index ad6e37f50a..efa8fd243a 100644
--- a/crates/ide_ssr/Cargo.toml
+++ b/crates/ide_ssr/Cargo.toml
@@ -5,6 +5,7 @@ description = "Structural search and replace of Rust code"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-analyzer/rust-analyzer"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/limit/Cargo.toml b/crates/limit/Cargo.toml
index 0bee06b0c8..04a3889c82 100644
--- a/crates/limit/Cargo.toml
+++ b/crates/limit/Cargo.toml
@@ -5,6 +5,7 @@ description = "TBD"
 license = "MIT OR Apache-2.0"
 authors = ["rust-analyzer developers"]
 edition = "2021"
+rust-version = "1.56"
 
 [features]
 tracking = []
diff --git a/crates/mbe/Cargo.toml b/crates/mbe/Cargo.toml
index 3cb06f3d8a..cff7224e02 100644
--- a/crates/mbe/Cargo.toml
+++ b/crates/mbe/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/parser/Cargo.toml b/crates/parser/Cargo.toml
index d74c903686..c31cfaafc7 100644
--- a/crates/parser/Cargo.toml
+++ b/crates/parser/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/paths/Cargo.toml b/crates/paths/Cargo.toml
index 446b8a5d68..f9ea5018cc 100644
--- a/crates/paths/Cargo.toml
+++ b/crates/paths/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/proc_macro_api/Cargo.toml b/crates/proc_macro_api/Cargo.toml
index 75ab9c13a4..42687355c3 100644
--- a/crates/proc_macro_api/Cargo.toml
+++ b/crates/proc_macro_api/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/proc_macro_srv/Cargo.toml b/crates/proc_macro_srv/Cargo.toml
index fab9cceb70..458bea1aa6 100644
--- a/crates/proc_macro_srv/Cargo.toml
+++ b/crates/proc_macro_srv/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/proc_macro_test/Cargo.toml b/crates/proc_macro_test/Cargo.toml
index 547a95d6e0..b5f18276ca 100644
--- a/crates/proc_macro_test/Cargo.toml
+++ b/crates/proc_macro_test/Cargo.toml
@@ -3,6 +3,7 @@ name = "proc_macro_test"
 version = "0.0.0"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 publish = false
 
 [lib]
diff --git a/crates/proc_macro_test/imp/Cargo.toml b/crates/proc_macro_test/imp/Cargo.toml
index 27ea2d9a8b..760c867817 100644
--- a/crates/proc_macro_test/imp/Cargo.toml
+++ b/crates/proc_macro_test/imp/Cargo.toml
@@ -3,6 +3,7 @@ name = "proc_macro_test_impl"
 version = "0.0.0"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 publish = false
 
 [lib]
diff --git a/crates/profile/Cargo.toml b/crates/profile/Cargo.toml
index 05b1c0b392..1d4f6d9147 100644
--- a/crates/profile/Cargo.toml
+++ b/crates/profile/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/project_model/Cargo.toml b/crates/project_model/Cargo.toml
index 7c930f6896..97c73ca11c 100644
--- a/crates/project_model/Cargo.toml
+++ b/crates/project_model/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/rust-analyzer/Cargo.toml b/crates/rust-analyzer/Cargo.toml
index 5d3aac42e3..4ad91e8da8 100644
--- a/crates/rust-analyzer/Cargo.toml
+++ b/crates/rust-analyzer/Cargo.toml
@@ -8,6 +8,7 @@ documentation = "https://rust-analyzer.github.io/manual.html"
 license = "MIT OR Apache-2.0"
 autobins = false
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/sourcegen/Cargo.toml b/crates/sourcegen/Cargo.toml
index 20954dfb47..34cebb34ec 100644
--- a/crates/sourcegen/Cargo.toml
+++ b/crates/sourcegen/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/stdx/Cargo.toml b/crates/stdx/Cargo.toml
index e37ecc8241..c456883a70 100644
--- a/crates/stdx/Cargo.toml
+++ b/crates/stdx/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/syntax/Cargo.toml b/crates/syntax/Cargo.toml
index 377e8aeab2..080697b96f 100644
--- a/crates/syntax/Cargo.toml
+++ b/crates/syntax/Cargo.toml
@@ -5,6 +5,7 @@ description = "Comment and whitespace preserving parser for the Rust language"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-analyzer/rust-analyzer"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/syntax/fuzz/Cargo.toml b/crates/syntax/fuzz/Cargo.toml
index 37394c5ba8..119a5651b8 100644
--- a/crates/syntax/fuzz/Cargo.toml
+++ b/crates/syntax/fuzz/Cargo.toml
@@ -4,6 +4,7 @@ name = "syntax-fuzz"
 version = "0.0.1"
 publish = false
 edition = "2021"
+rust-version = "1.56"
 
 [package.metadata]
 cargo-fuzz = true
diff --git a/crates/test_utils/Cargo.toml b/crates/test_utils/Cargo.toml
index 199155c0df..d0e4b465fa 100644
--- a/crates/test_utils/Cargo.toml
+++ b/crates/test_utils/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/text_edit/Cargo.toml b/crates/text_edit/Cargo.toml
index cce0d85c52..7cbe3412c9 100644
--- a/crates/text_edit/Cargo.toml
+++ b/crates/text_edit/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/toolchain/Cargo.toml b/crates/toolchain/Cargo.toml
index 76f61519b7..f0dc019fb9 100644
--- a/crates/toolchain/Cargo.toml
+++ b/crates/toolchain/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/tt/Cargo.toml b/crates/tt/Cargo.toml
index 5b3d8c4ee4..23b56e3309 100644
--- a/crates/tt/Cargo.toml
+++ b/crates/tt/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/vfs-notify/Cargo.toml b/crates/vfs-notify/Cargo.toml
index 4f24c595eb..7f7a9df375 100644
--- a/crates/vfs-notify/Cargo.toml
+++ b/crates/vfs-notify/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/crates/vfs/Cargo.toml b/crates/vfs/Cargo.toml
index ca0def4f34..f77e56f13e 100644
--- a/crates/vfs/Cargo.toml
+++ b/crates/vfs/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 description = "TBD"
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.56"
 
 [lib]
 doctest = false
diff --git a/lib/arena/Cargo.toml b/lib/arena/Cargo.toml
index 3fc690ff26..39b005d094 100644
--- a/lib/arena/Cargo.toml
+++ b/lib/arena/Cargo.toml
@@ -7,3 +7,4 @@ repository = "https://github.com/rust-analyzer/rust-analyzer"
 documentation = "https://docs.rs/la-arena"
 categories = ["data-structures", "memory-management", "rust-patterns"]
 edition = "2021"
+rust-version = "1.56"
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
index c743cd884d..a111b9d94f 100644
--- a/xtask/Cargo.toml
+++ b/xtask/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
-edition = "2021"
 name = "xtask"
 version = "0.1.0"
 publish = false
 license = "MIT OR Apache-2.0"
+edition = "2021"
+rust-version = "1.56"
 
 [dependencies]
 anyhow = "1.0.26"
diff --git a/xtask/src/install.rs b/xtask/src/install.rs
index 412132f60e..6bae5123a6 100644
--- a/xtask/src/install.rs
+++ b/xtask/src/install.rs
@@ -7,9 +7,6 @@ use xshell::{cmd, pushd};
 
 use crate::flags;
 
-// Latest stable, feel free to send a PR if this lags behind.
-const REQUIRED_RUST_VERSION: u32 = 56;
-
 impl flags::Install {
     pub(crate) fn run(self) -> Result<()> {
         if cfg!(target_os = "macos") {
@@ -137,19 +134,6 @@ fn install_client(client_opt: ClientOpt) -> Result<()> {
 }
 
 fn install_server(opts: ServerOpt) -> Result<()> {
-    let mut old_rust = false;
-    if let Ok(stdout) = cmd!("cargo --version").read() {
-        if !check_version(&stdout, REQUIRED_RUST_VERSION) {
-            old_rust = true;
-        }
-    }
-
-    if old_rust {
-        eprintln!(
-            "\nWARNING: at least rust 1.{}.0 is required to compile rust-analyzer\n",
-            REQUIRED_RUST_VERSION,
-        );
-    }
     let features = match opts.malloc {
         Malloc::System => &[][..],
         Malloc::Mimalloc => &["--features", "mimalloc"],
@@ -157,25 +141,6 @@ fn install_server(opts: ServerOpt) -> Result<()> {
     };
 
     let cmd = cmd!("cargo install --path crates/rust-analyzer --locked --force --features force-always-assert {features...}");
-    let res = cmd.run();
-
-    if res.is_err() && old_rust {
-        eprintln!(
-            "\nWARNING: at least rust 1.{}.0 is required to compile rust-analyzer\n",
-            REQUIRED_RUST_VERSION,
-        );
-    }
-
-    res?;
+    cmd.run()?;
     Ok(())
 }
-
-fn check_version(version_output: &str, min_minor_version: u32) -> bool {
-    // Parse second the number out of
-    //      cargo 1.39.0-beta (1c6ec66d5 2019-09-30)
-    let minor: Option<u32> = version_output.split('.').nth(1).and_then(|it| it.parse().ok());
-    match minor {
-        None => true,
-        Some(minor) => minor >= min_minor_version,
-    }
-}