diff --git a/README.md b/README.md
index 9fa887a..095a51f 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ For busy developers who appreciate the benefits of code linting but find it tedi
 - No configuration needed
 - Still fully flexible: you can specify your file patterns, disable rules that are not worth fixing , and have completely own, team- or company-wide ruleset (see [configuration](#configuration) section)
 - Supports new projects and existing codebases
-- Automatically updates linting dependencies using your project's dependency manager, Yarn or NPM
+- Automatically updates linting dependencies using your project's dependency manager. Currently supports `npm`, `yarn` and `pnpm`.
 - Supports monorepos - configures IDE once for the whole repo while keeping linting configurations per project
 
 ## Usage
diff --git a/src/lib/context/dependencies.ts b/src/lib/context/dependencies.ts
index 47aac04..41ea1ff 100644
--- a/src/lib/context/dependencies.ts
+++ b/src/lib/context/dependencies.ts
@@ -2,13 +2,15 @@
 import type { LockFileObject } from '@yarnpkg/lockfile'
 import { parse as parseYarnLock } from '@yarnpkg/lockfile'
 import fs from 'fs'
+import yaml from 'js-yaml'
 import path from 'path'
 import type { PackageJson } from 'type-fest'
 
 import type { PackageLock } from '../../types/packageLock'
+import type { PnpmLock } from '../../types/pnpmLock'
 import { fileExists } from '../../util/file'
 
-export type DependencyManager = 'npm' | 'yarn'
+export type DependencyManager = 'npm' | 'yarn' | 'pnpm'
 
 export interface InstalledPackage {
   name: string
@@ -97,16 +99,68 @@ interface GetInstalledPackagesParameters {
   projectDirectory: string
 }
 
+// eslint-disable-next-line sonarjs/cognitive-complexity
+const getPnpmPackages = (projectDirectory: string): InstalledPackage[] => {
+  const installedPackages: InstalledPackage[] = []
+  const pnpmLockRaw = fs.readFileSync(path.join(projectDirectory, 'pnpm-lock.yaml'), 'utf8')
+  const pnpmLock = yaml.load(pnpmLockRaw) as PnpmLock
+
+  for (const workspace in pnpmLock.importers) {
+    if (Object.prototype.hasOwnProperty.call(pnpmLock.importers, workspace)) {
+      for (const dependencyName in pnpmLock.importers[workspace].dependencies) {
+        if (
+          Object.prototype.hasOwnProperty.call(
+            pnpmLock.importers[workspace].dependencies,
+            dependencyName
+          )
+        ) {
+          const dependency = pnpmLock.importers[workspace].dependencies[dependencyName]
+          installedPackages.push({
+            name: dependencyName,
+            isDev: false,
+            version: dependency.version,
+          })
+        }
+      }
+      for (const dependencyName in pnpmLock.importers[workspace].devDependencies) {
+        if (
+          Object.prototype.hasOwnProperty.call(
+            pnpmLock.importers[workspace].devDependencies,
+            dependencyName
+          )
+        ) {
+          const dependency = pnpmLock.importers[workspace].devDependencies[dependencyName]
+          installedPackages.push({
+            name: dependencyName,
+            isDev: true,
+            version: dependency.version,
+          })
+        }
+      }
+    }
+  }
+
+  return installedPackages
+}
+
 export const getInstalledPackages = (
   parameters: GetInstalledPackagesParameters
 ): InstalledPackage[] => {
   const { packageJson, dependencyManager, projectDirectory } = parameters
-  let installedPackages: InstalledPackage[] = []
-  installedPackages =
-    dependencyManager === 'npm'
-      ? getNpmPackages(projectDirectory)
-      : getYarnPackages(packageJson, projectDirectory)
-  return installedPackages
+  switch (dependencyManager) {
+    case 'npm': {
+      return getNpmPackages(projectDirectory)
+    }
+    case 'yarn': {
+      return getYarnPackages(packageJson, projectDirectory)
+    }
+    case 'pnpm': {
+      return getPnpmPackages(projectDirectory)
+    }
+    default: {
+      return []
+    }
+  }
 }
 
 export const getDependencyManager = (projectDirectory: string): DependencyManager | undefined => {
@@ -114,6 +168,8 @@ export const getDependencyManager = (projectDirectory: string): DependencyManage
     return 'npm'
   } else if (fileExists(path.join(projectDirectory, 'yarn.lock'))) {
     return 'yarn'
+  } else if (fileExists(path.join(projectDirectory, 'pnpm-lock.yaml'))) {
+    return 'pnpm'
   }
   return undefined
 }
diff --git a/src/lib/eslint/installDependencies.ts b/src/lib/eslint/installDependencies.ts
index baa8117..54468b7 100644
--- a/src/lib/eslint/installDependencies.ts
+++ b/src/lib/eslint/installDependencies.ts
@@ -75,6 +75,27 @@ const installYarnDependencies = (parameters: InstallDependenciesParameters): voi
   }
 }
 
+const installPnpmDependencies = (parameters: InstallDependenciesParameters): void => {
+  const { dependenciesToUpdate, devDependenciesToUpdate, cwd, debug } = parameters
+  const dependencyList = dependenciesToUpdate
+    .map(([dependency, version]) => `${dependency}@${version}`)
+    .join(' ')
+  const developmentDependencyList = devDependenciesToUpdate
+    .map(([dependency, version]) => `${dependency}@${version}`)
+    .join(' ')
+
+  if (dependencyList) {
+    execSync(`pnpm add ${dependencyList} -w`, { cwd, stdio: debug ? 'inherit' : 'ignore' })
+  }
+
+  if (developmentDependencyList) {
+    execSync(`pnpm add -D ${developmentDependencyList} -w`, {
+      cwd,
+      stdio: debug ? 'inherit' : 'ignore',
+    })
+  }
+}
+
 interface Parameters {
   dependencyManager?: DependencyManager
   dependencies: ExactDependency[]
@@ -102,27 +123,45 @@ export const installDependencies = (parameters: Parameters) => {
 
   log.debug(`dependencies to install or update: ${readableDependencyList}`)
 
-  if (!dependencyManager) {
-    execSync('npm init -y', { cwd, stdio: debug ? 'inherit' : 'ignore' })
-    installNpmDependencies({
-      dependenciesToUpdate,
-      devDependenciesToUpdate,
-      cwd,
-      debug,
-    })
-  } else if (dependencyManager === 'npm') {
-    installNpmDependencies({
-      dependenciesToUpdate,
-      devDependenciesToUpdate,
-      cwd,
-      debug,
-    })
-  } else {
-    installYarnDependencies({
-      dependenciesToUpdate,
-      devDependenciesToUpdate,
-      cwd,
-      debug,
-    })
+  switch (dependencyManager) {
+    case 'npm': {
+      installNpmDependencies({
+        dependenciesToUpdate,
+        devDependenciesToUpdate,
+        cwd,
+        debug,
+      })
+
+      break
+    }
+    case 'yarn': {
+      installYarnDependencies({
+        dependenciesToUpdate,
+        devDependenciesToUpdate,
+        cwd,
+        debug,
+      })
+
+      break
+    }
+    case 'pnpm': {
+      installPnpmDependencies({
+        dependenciesToUpdate,
+        devDependenciesToUpdate,
+        cwd,
+        debug,
+      })
+
+      break
+    }
+    default: {
+      execSync('npm init -y', { cwd, stdio: debug ? 'inherit' : 'ignore' })
+      installNpmDependencies({
+        dependenciesToUpdate,
+        devDependenciesToUpdate,
+        cwd,
+        debug,
+      })
+    }
   }
 }
diff --git a/src/types/pnpmLock.ts b/src/types/pnpmLock.ts
new file mode 100644
index 0000000..3382efc
--- /dev/null
+++ b/src/types/pnpmLock.ts
@@ -0,0 +1,39 @@
+import type { JsonObject } from 'type-fest'
+
+export interface PnpmLock {
+  lockfileVersion: string
+  settingsautoInstallPeers: {
+    autoInstallPeers: boolean
+    excludeLinksFromLockfile: boolean
+  }
+  importers: Record<
+    string,
+    {
+      dependencies: Record<string, PackageDescriptor>
+      devDependencies: Record<string, PackageDescriptor>
+    }
+  >
+  packages: Record<
+    string,
+    {
+      resolution: {
+        integrity: string
+      }
+      engines?: Record<string, string>
+      transitivePeerDependencies?: string[]
+      dependencies?: Record<string, string>
+      peerDependencies?: Record<string, string>
+      peerDependenciesMeta?: Record<string, JsonObject>
+      cpu?: string[]
+      os?: string[]
+      hasBin?: boolean
+      requiresBuild?: boolean
+      dev: boolean
+    }
+  >
+}
+
+interface PackageDescriptor {
+  specifier: string
+  version: string
+}