3 files changed, 9 insertions, 7 deletions

diff --git a/package-lock.json b/package-lock.json
index 2617e32..2769f8a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "dhall-json",
-  "version": "1.0.0",
+  "version": "2.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 3a7dfd0..5d7cb78 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dhall-json",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "NPM package for `dhall-json`, based on https://github.com/justinwoo/npm-psc-package-bin-simple.",
   "os": [
     "darwin",
diff --git a/preinstall.js b/preinstall.js
index 91c3a52..292b73b 100644
--- a/preinstall.js
+++ b/preinstall.js
@@ -60,14 +60,16 @@ const readVersion = name =>
 const dhallVersion = readVersion("dhall");
 const dhallJsonVersion = readVersion("dhall-json");
 
-const isLowerThan = (version, upperBound) =>
+const isLesserThan = (version, upperBound) =>
   semver.valid(version) && semver.lt(version, upperBound);
+const isGreaterThan = (version, lowerBound) =>
+  semver.valid(version) && semver.gt(version, lowerBound);
 
-if (isLowerThan(dhallJsonVersion, "1.2.8")) {
+if (isLesserThan(dhallJsonVersion, "1.2.8")) {
   throw new Error(`This release of the \`${pkg.name}\` npm package installs \`json-to-dhall\`, which isn’t provided by \`dhall-json@<1.2.8\`.`);
 }
-if (isLowerThan(dhallJsonVersion, "1.3.0")) {
-  throw new Error(`This release of the \`${pkg.name}\` npm package installs \`yaml-to-dhall\`, which isn’t provided by \`dhall-json@<1.3.0\`.`);
+if (isLesserThan(dhallJsonVersion, "1.3.0") || isGreaterThan(dhallJsonVersion, "1.5.0")) {
+  throw new Error(`This release of the \`${pkg.name}\` npm package installs \`yaml-to-dhall\`, which isn’t provided by \`dhall-json@<1.3.0 >1.5.0\`.`);
 }
 
 const release = `https://github.com/dhall-lang/dhall-haskell/releases/download/${dhallVersion}/dhall-json-${dhallJsonVersion}`;
@@ -87,7 +89,7 @@ if (process.platform === "win32") {
 } else {
   const isDarwin = process.platform === 'darwin';
 
-  if (isDarwin && isLowerThan(dhallJsonVersion, "1.4.0")) {
+  if (isDarwin && isLesserThan(dhallJsonVersion, "1.4.0")) {
     throw new Error(`Static macOS binaries aren’t provided by \`dhall-json@<1.4.0\`.`);
   }