diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 19e87b9..45fe190 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -24,7 +24,7 @@ quote = "0.6.10"
 
 [build-dependencies]
 lalrpop = "0.17.0"
-version_check = "0.1.5"
+version_check = "0.9.1"
 
 [features]
 dodrio = []
diff --git a/macros/build.rs b/macros/build.rs
index 78d2b19..e041522 100644
--- a/macros/build.rs
+++ b/macros/build.rs
@@ -4,7 +4,7 @@ extern crate version_check;
 fn main() {
     lalrpop::process_root().unwrap();
 
-    if version_check::is_nightly().unwrap_or(false) {
+    if version_check::is_feature_flaggable().unwrap_or(false) {
         println!("cargo:rustc-cfg=can_join_spans");
         println!("cargo:rustc-cfg=can_show_location_of_runtime_parse_error");
     }
diff --git a/ui/Cargo.toml b/ui/Cargo.toml
index 05c8ac9..e403a53 100644
--- a/ui/Cargo.toml
+++ b/ui/Cargo.toml
@@ -13,4 +13,4 @@ path = "main.rs"
 compiletest_rs = { version = "0.3", features = ["stable"] }
 typed-html = { path = "../typed-html" }
 typed-html-macros = { path = "../macros" }
-version_check = "0.1.5"
+version_check = "0.9.1"
diff --git a/ui/main.rs b/ui/main.rs
index 622d7b0..5b254cc 100644
--- a/ui/main.rs
+++ b/ui/main.rs
@@ -2,7 +2,7 @@
 fn ui() {
     extern crate version_check;
 
-    if !version_check::is_nightly().unwrap_or(false) {
+    if !version_check::is_feature_flaggable().unwrap_or(false) {
         return;
     }