diff --git a/rust-version b/rust-version
index b945d0b3a26..9d2a8772234 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-d8f50ab0ea6c529c24e575279acc72093caeb679
+374c63e0fc356eb61b1966cb6026a2a49fe9226d
diff --git a/src/bin/miri-rustc-tests.rs b/src/bin/miri-rustc-tests.rs
index e8714123ceb..9b0d02f4b7e 100644
--- a/src/bin/miri-rustc-tests.rs
+++ b/src/bin/miri-rustc-tests.rs
@@ -43,7 +43,7 @@ fn after_analysis(&mut self, compiler: &interface::Compiler) -> bool {
         compiler.session().abort_if_errors();
         compiler.global_ctxt().unwrap().peek_mut().enter(|tcx| {
             if std::env::args().any(|arg| arg == "--test") {
-                struct Visitor<'tcx>(TyCtxt<'tcx, 'tcx>);
+                struct Visitor<'tcx>(TyCtxt<'tcx>);
                 impl<'tcx, 'hir> itemlikevisit::ItemLikeVisitor<'hir> for Visitor<'tcx> {
                     fn visit_item(&mut self, i: &'hir hir::Item) {
                         if let hir::ItemKind::Fn(.., body_id) = i.node {
diff --git a/src/lib.rs b/src/lib.rs
index 822b173e34a..061b07478a2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -72,7 +72,7 @@ pub struct MiriConfig {
 
 // Used by priroda.
 pub fn create_ecx<'mir, 'tcx: 'mir>(
-    tcx: TyCtxt<'tcx, 'tcx>,
+    tcx: TyCtxt<'tcx>,
     main_id: DefId,
     config: MiriConfig,
 ) -> InterpResult<'tcx, InterpretCx<'mir, 'tcx, Evaluator<'tcx>>> {
@@ -212,7 +212,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
 }
 
 pub fn eval_main<'tcx>(
-    tcx: TyCtxt<'tcx, 'tcx>,
+    tcx: TyCtxt<'tcx>,
     main_id: DefId,
     config: MiriConfig,
 ) {
@@ -475,7 +475,7 @@ fn box_alloc(
 
     fn find_foreign_static(
         def_id: DefId,
-        tcx: TyCtxtAt<'tcx, 'tcx>,
+        tcx: TyCtxtAt<'tcx>,
     ) -> InterpResult<'tcx, Cow<'tcx, Allocation>> {
         let attrs = tcx.get_attrs(def_id);
         let link_name = match attr::first_attr_value_str_by_name(&attrs, sym::link_name) {