diff --git a/.gitignore b/.gitignore
index 1265784..da6853c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -82,4 +82,4 @@ typings/
 # Compile Output
 lib/
 coverage/
-docs/
\ No newline at end of file
+docs/
diff --git a/README.md b/README.md
index 7b1c26e..f6296f0 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ Full documentation of available functions and configuration can be found on:
 
 ### 1. Disparity in supported flags
 
-At the current moment `yarn` has no equivalent flags for `--save-bundle` or `--no-save`. These will be ignored when `yarn` has been detected as package manager.
+At the current moment `yarn` and `pnpm` have no equivalent flags for `--save-bundle` or `--no-save`. These will be ignored when `yarn` or `pnpm` has been detected as package manager.
 
 The flags that were ignored in the run are returned as the `ignoredFlags` property.
 
diff --git a/package.json b/package.json
index 55c0f7d..7268c7c 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
   "keywords": [
     "npm",
     "yarn",
+    "pnpm",
     "install",
     "cli",
     "script"
@@ -37,7 +38,7 @@
     "typedoc": "^0.14.2",
     "typedoc-plugin-external-module-name": "^2.0.0",
     "typedoc-plugin-internal-external": "^2.0.1",
-    "typescript": "^3.3.3"
+    "typescript": "^5.4.3"
   },
   "bugs": {
     "url": "https://github.com/dkundel/pkg-install/issues",
diff --git a/src/install.ts b/src/install.ts
index 55749c9..b10418e 100644
--- a/src/install.ts
+++ b/src/install.ts
@@ -9,6 +9,7 @@ import {
 import { getExecaConfig, getPackageList } from './helpers';
 import { constructNpmArguments, npmProjectInstallArgs } from './npm';
 import { getPackageManager, getPackageManagerSync } from './package-manager';
+import { constructPnpmArguments, pnpmProjectInstallArgs } from "./pnpm";
 import { PackageList, Packages } from './types';
 import { constructYarnArguments, yarnProjectInstallArgs } from './yarn';
 
@@ -36,7 +37,11 @@ export async function install(
 
   const packageList = getPackageList(packages);
   const getArguments =
-    pkgManager === 'npm' ? constructNpmArguments : constructYarnArguments;
+    pkgManager === "npm"
+      ? constructNpmArguments
+      : pkgManager === "yarn"
+      ? constructYarnArguments
+      : constructPnpmArguments;
   const { args, ignoredFlags } = getArguments(packageList, config);
 
   const result = await execa(pkgManager, args, getExecaConfig(config));
@@ -68,7 +73,11 @@ export function installSync(
 
   const packageList = getPackageList(packages);
   const getArguments =
-    pkgManager === 'npm' ? constructNpmArguments : constructYarnArguments;
+    pkgManager === "npm"
+      ? constructNpmArguments
+      : pkgManager === "yarn"
+      ? constructYarnArguments
+      : constructPnpmArguments;
   const { args, ignoredFlags } = getArguments(packageList, config);
 
   const result = execa.sync(pkgManager, args, getExecaConfig(config));
@@ -97,7 +106,11 @@ export async function projectInstall(
   const pkgManager = await getPackageManager(config);
 
   const args =
-    pkgManager === 'npm' ? npmProjectInstallArgs : yarnProjectInstallArgs;
+    pkgManager === "npm"
+      ? npmProjectInstallArgs
+      : pkgManager === "yarn"
+      ? yarnProjectInstallArgs
+      : pnpmProjectInstallArgs;
 
   return execa(pkgManager, args, getExecaConfig(config));
 }
@@ -121,7 +134,11 @@ export function projectInstallSync(
   const pkgManager = getPackageManagerSync(config);
 
   const args =
-    pkgManager === 'npm' ? npmProjectInstallArgs : yarnProjectInstallArgs;
+    pkgManager === "npm"
+      ? npmProjectInstallArgs
+      : pkgManager === "yarn"
+      ? yarnProjectInstallArgs
+      : pnpmProjectInstallArgs;
 
   return execa.sync(pkgManager, args, getExecaConfig(config));
 }
diff --git a/src/package-manager.ts b/src/package-manager.ts
index 9e502dd..37bf75e 100644
--- a/src/package-manager.ts
+++ b/src/package-manager.ts
@@ -12,7 +12,7 @@ import {
 
 /**
  * Determine what package manager to use based on what preference is set,
- * and whether it's currently running in a yarn/npm script
+ * and whether it's currently running in a yarn/npm/pnpm script
  *
  * @export
  * @param {InstallConfig} config
diff --git a/src/pnpm.ts b/src/pnpm.ts
new file mode 100644
index 0000000..5b7b394
--- /dev/null
+++ b/src/pnpm.ts
@@ -0,0 +1,48 @@
+import { InstallConfig, PackageManagerFlag } from "./config";
+import { getFlagsToSet } from "./flags";
+import { UnreachableCaseError } from "./helpers";
+import { ConstructArgumentsResult, PackageList } from "./types";
+
+export function constructPnpmArguments(
+  packageList: PackageList,
+  config: InstallConfig
+): ConstructArgumentsResult {
+  const flagsToSet = getFlagsToSet(config);
+  const globalCommand = config.global ? ["--global"] : [];
+  const cwdCommand = config.forceCwd ? ["--pnpm-prefix", config.cwd] : [];
+  const args: string[] = [
+    "install",
+    ...globalCommand,
+    ...cwdCommand,
+    "add",
+    ...packageList,
+  ];
+
+  const ignoredFlags: PackageManagerFlag[] = [];
+  flagsToSet.forEach((flag) => {
+    switch (flag) {
+      case "dev":
+        if (!config.global) {
+          args.push("--save-dev");
+        } else {
+          ignoredFlags.push(flag);
+        }
+        break;
+      case "exact":
+        args.push("--save-exact");
+        break;
+      case "verbose":
+      case "bundle":
+      case "noSave":
+        ignoredFlags.push(flag);
+        break;
+      /* istanbul ignore next */
+      default:
+        throw new UnreachableCaseError(flag);
+    }
+  });
+
+  return { args, ignoredFlags };
+}
+
+export const pnpmProjectInstallArgs = ["install"];
diff --git a/src/types.ts b/src/types.ts
index 409a1ba..d4ce277 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -8,7 +8,7 @@ export type PackageMap = {
 
 export type PackageList = string[];
 export type Packages = PackageMap | PackageList;
-export type SupportedPackageManagers = 'yarn' | 'npm';
+export type SupportedPackageManagers = 'yarn' | 'npm' | 'pnpm';
 
 /**
  * What to do with I/O. This is passed to `execa`
diff --git a/src/utils/package-manager-utils.ts b/src/utils/package-manager-utils.ts
index 9d707e2..25bc9fc 100644
--- a/src/utils/package-manager-utils.ts
+++ b/src/utils/package-manager-utils.ts
@@ -62,6 +62,10 @@ export function getCurrentPackageManager(): SupportedPackageManagers | null {
     return 'yarn';
   }
 
+  if (userAgent.startsWith('pnpm')) {
+    return 'pnpm';
+  }
+
   return null;
 }
 
@@ -77,6 +81,7 @@ export async function getPackageManagerFromLockfile(
 ): Promise<SupportedPackageManagers | null> {
   const pkgLockPath = path.join(config.cwd, 'package-lock.json');
   const yarnLockPath = path.join(config.cwd, 'yarn.lock');
+  const pnpmLockPath = path.join(config.cwd, 'pnpm-lock.yaml');
   try {
     await access(pkgLockPath);
     return 'npm';
@@ -85,7 +90,12 @@ export async function getPackageManagerFromLockfile(
       await access(yarnLockPath);
       return 'yarn';
     } catch (err) {
-      return null;
+      try {
+        await access(pnpmLockPath);
+        return 'pnpm';
+      } catch (err) {
+        return null;
+      }
     }
   }
 }
@@ -102,6 +112,7 @@ export function getPackageManagerFromLockfileSync(
 ): SupportedPackageManagers | null {
   const pkgLockPath = path.join(config.cwd, 'package-lock.json');
   const yarnLockPath = path.join(config.cwd, 'yarn.lock');
+  const pnpmLockPath = path.join(config.cwd, 'pnpm-lock.yaml');
   try {
     accessSync(pkgLockPath);
     return 'npm';
@@ -110,7 +121,12 @@ export function getPackageManagerFromLockfileSync(
       accessSync(yarnLockPath);
       return 'yarn';
     } catch (err) {
-      return null;
+      try {
+        accessSync(pnpmLockPath);
+        return 'pnpm';
+      } catch (err) {
+        return null;
+      }
     }
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
index 3607e31..d62a5bb 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -44,7 +44,7 @@
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
@@ -56,5 +56,7 @@
     /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+
+    "useUnknownInCatchVariables": false
   }
 }
diff --git a/typedoc.json b/typedoc.json
index 9a57dfd..3ee1d4d 100644
--- a/typedoc.json
+++ b/typedoc.json
@@ -4,6 +4,6 @@
   "mode": "modules",
   "out": "docs",
   "theme": "default",
-  "exclude": ["**/__tests__/*.ts", "**/helpers.ts", "**/npm.ts", "**/yarn.ts"],
+  "exclude": ["**/__tests__/*.ts", "**/helpers.ts", "**/npm.ts", "**/yarn.ts", "**/pnpm.ts"],
   "gaID": "UA-40008341-3"
 }