diff --git a/package-lock.json b/package-lock.json
index 6f9c9e0..27100f2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "0.2.0",
       "license": "Apache-2.0",
       "dependencies": {
+        "abstract-logging": "^2.0.1",
         "rfdc": "^1.3.1",
         "semver": "^7.6.0"
       },
@@ -20,6 +21,8 @@
         "@types/semver": "^7.5.8",
         "borp": "^0.10.0",
         "desm": "^1.3.1",
+        "pino": "^8.19.0",
+        "pino-test": "^1.0.0",
         "prettier": "^3.2.5",
         "typescript": "^5.3.3"
       }
@@ -178,6 +181,23 @@
       "integrity": "sha512-I8EUhyrgfLrcTkzV3TSsGyl1tSuPrEDzr0yd5m90UgNxQkyDXULk3b6MlQqTCpZpNtWe1K0hzclnZkTcLBe2UQ==",
       "dev": true
     },
+    "node_modules/abort-controller": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
+      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
+      "dev": true,
+      "dependencies": {
+        "event-target-shim": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=6.5"
+      }
+    },
+    "node_modules/abstract-logging": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/abstract-logging/-/abstract-logging-2.0.1.tgz",
+      "integrity": "sha512-2BjRTZxTPvheOvGbBslFSYOUkr+SjPtOnrLP33f+VIWLzezQpZcqVg7ja3L4dBXmzzgwT+a029jRx5PCi3JuiA=="
+    },
     "node_modules/ansi-regex": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
@@ -202,12 +222,41 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/atomic-sleep": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/atomic-sleep/-/atomic-sleep-1.0.0.tgz",
+      "integrity": "sha512-kNOjDqAh7px0XWNI+4QbzoiR/nTkHAWNud2uvnJquD1/x5a7EQZMJT0AczqK0Qn67oY/TTQ1LbUKajZpp3I9tQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/borp": {
       "version": "0.10.0",
       "resolved": "https://registry.npmjs.org/borp/-/borp-0.10.0.tgz",
@@ -233,6 +282,30 @@
         "balanced-match": "^1.0.0"
       }
     },
+    "node_modules/buffer": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.2.1"
+      }
+    },
     "node_modules/c8": {
       "version": "9.1.0",
       "resolved": "https://registry.npmjs.org/c8/-/c8-9.1.0.tgz",
@@ -528,6 +601,24 @@
         "node": ">=8"
       }
     },
+    "node_modules/event-target-shim": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/event-target-shim/-/event-target-shim-5.0.1.tgz",
+      "integrity": "sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/events": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/events/-/events-3.3.0.tgz",
+      "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.8.x"
+      }
+    },
     "node_modules/execa": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/execa/-/execa-8.0.1.tgz",
@@ -551,6 +642,15 @@
         "url": "https://github.com/sindresorhus/execa?sponsor=1"
       }
     },
+    "node_modules/fast-redact": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/fast-redact/-/fast-redact-3.4.0.tgz",
+      "integrity": "sha512-2gwPvyna0zwBdxKnng1suu/dTL5s8XEy2ZqH8mwDUwJdDkV8w5kp+JV26mupdK68HmPMbm6yjW9m7/Ys/BHEHg==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/find-up": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-7.0.0.tgz",
@@ -657,6 +757,26 @@
         "node": ">=16.17.0"
       }
     },
+    "node_modules/ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -865,6 +985,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/on-exit-leak-free": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/on-exit-leak-free/-/on-exit-leak-free-2.1.2.tgz",
+      "integrity": "sha512-0eJJY6hXLGf1udHwfNftBqH+g73EU4B504nZeKpz1sYRKafAghwxEJunB2O7rDZkL4PGfsMVnTXZ2EjibbqcsA==",
+      "dev": true,
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -962,6 +1091,53 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/pino": {
+      "version": "8.19.0",
+      "resolved": "https://registry.npmjs.org/pino/-/pino-8.19.0.tgz",
+      "integrity": "sha512-oswmokxkav9bADfJ2ifrvfHUwad6MLp73Uat0IkQWY3iAw5xTRoznXbXksZs8oaOUMpmhVWD+PZogNzllWpJaA==",
+      "dev": true,
+      "dependencies": {
+        "atomic-sleep": "^1.0.0",
+        "fast-redact": "^3.1.1",
+        "on-exit-leak-free": "^2.1.0",
+        "pino-abstract-transport": "v1.1.0",
+        "pino-std-serializers": "^6.0.0",
+        "process-warning": "^3.0.0",
+        "quick-format-unescaped": "^4.0.3",
+        "real-require": "^0.2.0",
+        "safe-stable-stringify": "^2.3.1",
+        "sonic-boom": "^3.7.0",
+        "thread-stream": "^2.0.0"
+      },
+      "bin": {
+        "pino": "bin.js"
+      }
+    },
+    "node_modules/pino-abstract-transport": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/pino-abstract-transport/-/pino-abstract-transport-1.1.0.tgz",
+      "integrity": "sha512-lsleG3/2a/JIWUtf9Q5gUNErBqwIu1tUKTT3dUzaf5DySw9ra1wcqKjJjLX1VTY64Wk1eEOYsVGSaGfCK85ekA==",
+      "dev": true,
+      "dependencies": {
+        "readable-stream": "^4.0.0",
+        "split2": "^4.0.0"
+      }
+    },
+    "node_modules/pino-std-serializers": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/pino-std-serializers/-/pino-std-serializers-6.2.2.tgz",
+      "integrity": "sha512-cHjPPsE+vhj/tnhCy/wiMh3M3z3h/j15zHQX+S9GkTBgqJuTuJzYJ4gUyACLhDaJ7kk9ba9iRDmbH2tJU03OiA==",
+      "dev": true
+    },
+    "node_modules/pino-test": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/pino-test/-/pino-test-1.0.0.tgz",
+      "integrity": "sha512-uoyAzF8Wpa9MzI+MNbyUHr7kZDRR07Ro47fryutqJUD6UtCojF3NybdaPfOOSmbS0F0x8OpCOHl4NF+r34JccA==",
+      "dev": true,
+      "dependencies": {
+        "split2": "^4.2.0"
+      }
+    },
     "node_modules/prettier": {
       "version": "3.2.5",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.5.tgz",
@@ -977,6 +1153,52 @@
         "url": "https://github.com/prettier/prettier?sponsor=1"
       }
     },
+    "node_modules/process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
+      "integrity": "sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
+    "node_modules/process-warning": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/process-warning/-/process-warning-3.0.0.tgz",
+      "integrity": "sha512-mqn0kFRl0EoqhnL0GQ0veqFHyIN1yig9RHh/InzORTUiZHFRAur+aMtRkELNwGs9aNwKS6tg/An4NYBPGwvtzQ==",
+      "dev": true
+    },
+    "node_modules/quick-format-unescaped": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/quick-format-unescaped/-/quick-format-unescaped-4.0.4.tgz",
+      "integrity": "sha512-tYC1Q1hgyRuHgloV/YXs2w15unPVh8qfu/qCTfhTYamaw7fyhumKa2yGpdSo87vY32rIclj+4fWYQXUMs9EHvg==",
+      "dev": true
+    },
+    "node_modules/readable-stream": {
+      "version": "4.5.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-4.5.2.tgz",
+      "integrity": "sha512-yjavECdqeZ3GLXNgRXgeQEdz9fvDDkNKyHnbHRFtOr7/LcfgBcmct7t/ET+HaCTqfh06OzoAxrkN/IfjJBVe+g==",
+      "dev": true,
+      "dependencies": {
+        "abort-controller": "^3.0.0",
+        "buffer": "^6.0.3",
+        "events": "^3.3.0",
+        "process": "^0.11.10",
+        "string_decoder": "^1.3.0"
+      },
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      }
+    },
+    "node_modules/real-require": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/real-require/-/real-require-0.2.0.tgz",
+      "integrity": "sha512-57frrGM/OCTLqLOAh0mhVA9VBMHd+9U7Zb2THMGdBUoZVOtGbJzjxsYGDJ3A9AYYCP4hn6y1TVbaOfzWtm5GFg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 12.13.0"
+      }
+    },
     "node_modules/require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -991,6 +1213,35 @@
       "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.3.1.tgz",
       "integrity": "sha512-r5a3l5HzYlIC68TpmYKlxWjmOP6wiPJ1vWv2HeLhNsRZMrCkxeqxiHlQ21oXmQ4F3SiryXBHhAD7JZqvOJjFmg=="
     },
+    "node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
+    "node_modules/safe-stable-stringify": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.4.3.tgz",
+      "integrity": "sha512-e2bDA2WJT0wxseVd4lsDP4+3ONX6HpMXQa1ZhFQ7SU+GjvORCmShbCMltrtIDfkYhVHrOcPtj+KhmDBdPdZD1g==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/semver": {
       "version": "7.6.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.0.tgz",
@@ -1049,6 +1300,24 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/sonic-boom": {
+      "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/sonic-boom/-/sonic-boom-3.8.0.tgz",
+      "integrity": "sha512-ybz6OYOUjoQQCQ/i4LU8kaToD8ACtYP+Cj5qd2AO36bwbdewxWJ3ArmJ2cr6AvxlL2o0PqnCcPGUgkILbfkaCA==",
+      "dev": true,
+      "dependencies": {
+        "atomic-sleep": "^1.0.0"
+      }
+    },
+    "node_modules/split2": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz",
+      "integrity": "sha512-UcjcJOWknrNkF6PLX83qcHM6KHgVKNkV62Y8a5uYDVv9ydGQVwAHMKqHdJje1VTWpljG0WYpCDhrCdAOYH4TWg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 10.x"
+      }
+    },
     "node_modules/stack-utils": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/stack-utils/-/stack-utils-2.0.6.tgz",
@@ -1061,6 +1330,15 @@
         "node": ">=10"
       }
     },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
     "node_modules/string-width": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -1237,6 +1515,15 @@
         "node": "*"
       }
     },
+    "node_modules/thread-stream": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/thread-stream/-/thread-stream-2.4.1.tgz",
+      "integrity": "sha512-d/Ex2iWd1whipbT681JmTINKw0ZwOUBZm7+Gjs64DHuX34mmw8vJL2bFAaNacaW72zYiTJxSHi5abUuOi5nsfg==",
+      "dev": true,
+      "dependencies": {
+        "real-require": "^0.2.0"
+      }
+    },
     "node_modules/tunnel": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
diff --git a/package.json b/package.json
index a7db30c..dc707ee 100644
--- a/package.json
+++ b/package.json
@@ -35,11 +35,13 @@
     "@fastify/pre-commit": "^2.1.0",
     "@matteo.collina/tspl": "^0.1.1",
     "@types/node": "^20.11.24",
+    "@types/rfdc": "^1.2.0",
+    "@types/semver": "^7.5.8",
     "borp": "^0.10.0",
     "desm": "^1.3.1",
+    "pino": "^8.19.0",
+    "pino-test": "^1.0.0",
     "prettier": "^3.2.5",
-    "@types/rfdc": "^1.2.0",
-    "@types/semver": "^7.5.8",
     "typescript": "^5.3.3"
   },
   "prettier": {
@@ -60,6 +62,7 @@
   "main": "./dist/semgrator.js",
   "types": "./dist/semgrator.d.ts",
   "dependencies": {
+    "abstract-logging": "^2.0.1",
     "rfdc": "^1.3.1",
     "semver": "^7.6.0"
   }
diff --git a/src/lib/abstract-logging.d.ts b/src/lib/abstract-logging.d.ts
new file mode 100644
index 0000000..a09a167
--- /dev/null
+++ b/src/lib/abstract-logging.d.ts
@@ -0,0 +1,19 @@
+declare module 'abstract-logging' {
+  interface LogFn {
+    // TODO: why is this different from `obj: object` or `obj: any`?
+    /* tslint:disable:no-unnecessary-generics */
+    <T extends object>(obj: T, msg?: string, ...args: any[]): void
+    (obj: unknown, msg?: string, ...args: any[]): void
+    (msg: string, ...args: any[]): void
+  }
+
+  export interface AbstractLogger {
+    error: LogFn
+    warn: LogFn
+    info: LogFn
+    debug: LogFn
+    trace: LogFn
+  }
+
+  export default abstractLogger
+}
diff --git a/src/lib/semgrator.ts b/src/lib/semgrator.ts
index 310e389..e01350a 100644
--- a/src/lib/semgrator.ts
+++ b/src/lib/semgrator.ts
@@ -3,6 +3,7 @@ import { join } from 'node:path'
 import { pathToFileURL } from 'node:url'
 import { readdir } from 'node:fs/promises'
 import rfdc from 'rfdc'
+import abstractLogger, { AbstractLogger } from 'abstract-logging'
 
 const clone = rfdc()
 
@@ -15,6 +16,7 @@ export type Migration<Input, Output = Input> = {
 interface BaseSemgratorParams<Input> {
   version: string
   input: Input
+  logger?: AbstractLogger
 }
 
 interface SemgratorParamsWithMigrations<Input, Output>
@@ -92,6 +94,7 @@ async function* processMigrations<Input, Output>(
     | Migration<Input, Output>[]
     | AsyncGenerator<Migration<Input, Output>>,
   version: string,
+  logger: AbstractLogger,
 ): AsyncGenerator<SemgratorResult<Output>> {
   let result = input as unknown
   let lastVersion = version
@@ -99,6 +102,8 @@ async function* processMigrations<Input, Output>(
 
   for await (const migration of migrations) {
     if (semver.gt(migration.version, lastVersion)) {
+      logger.info(`Migrating to version ${migration.version}`)
+
       // @ts-expect-error
       result = await migration.up(clone(result))
       lastVersion = migration.toVersion || migration.version
@@ -115,6 +120,7 @@ function semgratorWithMigrations<Input, Output>(
     params.input,
     params.migrations,
     params.version,
+    params.logger || abstractLogger,
   )
 
   let processing: Promise<SemgratorResult<Output>> | undefined
diff --git a/src/test/logger.test.ts b/src/test/logger.test.ts
new file mode 100644
index 0000000..77798af
--- /dev/null
+++ b/src/test/logger.test.ts
@@ -0,0 +1,47 @@
+import { test } from 'node:test'
+import { pino } from 'pino'
+import { sink, consecutive } from 'pino-test'
+import { semgrator, Migration } from '../lib/semgrator.js'
+
+type SeenBy = {
+  foo: string
+}
+
+test('logger', async t => {
+  const m1: Migration<SeenBy> = {
+    version: '2.0.0',
+    async up(input) {
+      return input
+    },
+  }
+
+  const m2: Migration<SeenBy> = {
+    version: '2.4.0',
+    async up(input) {
+      return input
+    },
+  }
+
+  const stream = sink()
+  const logger = pino(stream)
+
+  await semgrator<SeenBy, SeenBy>({
+    version: '1.0.0',
+    migrations: [m1, m2],
+    logger,
+    input: {
+      foo: 'bar',
+    },
+  })
+
+  await consecutive(stream, [
+    {
+      msg: 'Migrating to version 2.0.0',
+      level: 30,
+    },
+    {
+      msg: 'Migrating to version 2.4.0',
+      level: 30,
+    },
+  ])
+})