diff --git a/README.md b/README.md
index dcf3ede..8387fe9 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ A curated list of awesome PostgreSQL software, libraries, tools and resources, i
 * [PSequel](http://www.psequel.com/) - Clean and simple interface to perform common PostgreSQL tasks quickly (Commercial Software).
 * [SQL Tabs](http://www.sqltabs.com/) - Cross Platform Desktop Client for PostgreSQL written in JS.
 * [SQLPro for Postgres](http://macpostgresclient.com/) - Simple, powerful PostgreSQL manager for macOS (Commercial Software).
-* [Warp](http://warp.one/) - macOS desktop tool for by-example querying and data transfer from/to PostgreSQL (Commercial Software).
+* [Warp](https://warp.one/) - macOS desktop tool for by-example querying and data transfer from/to PostgreSQL (Commercial Software).
 
 ### Distributions
 * [Postgres.app](http://postgresapp.com/) - The Easiest Way to Get Started with PostgreSQL on macOS.
@@ -77,13 +77,13 @@ A curated list of awesome PostgreSQL software, libraries, tools and resources, i
 
 ### Extensions
 * [cstore\_fdw](https://github.com/citusdata/cstore_fdw) - Columnar store for analytics with PostgreSQL.
-* [cyanaudit](http://pgxn.org/dist/cyanaudit/) - Cyan Audit provides in-database logging of all DML activity on a column-by-column basis.
+* [cyanaudit](https://pgxn.org/dist/cyanaudit/) - Cyan Audit provides in-database logging of all DML activity on a column-by-column basis.
 * [pglogical](https://github.com/2ndQuadrant/pglogical) - Extension that provides logical streaming replication.
 * [pg\_partman](https://github.com/keithf4/pg_partman) - Partition management extension for PostgreSQL.
 * [pg\_paxos](https://github.com/citusdata/pg_paxos/) - Basic implementation of Paxos and Paxos-based table replication for a cluster of PostgreSQL nodes.
 * [pg\_shard](https://github.com/citusdata/pg_shard) - Extension to scale out real-time reads and writes.
 * [PGStrom](https://wiki.postgresql.org/wiki/PGStrom) - Extension to offload CPU intensive workloads to GPU.
-* [pgxn](http://pgxn.org/) PostgreSQL Extension Network - central distribution point for many open-source PostgreSQL extensions
+* [pgxn](https://pgxn.org/) PostgreSQL Extension Network - central distribution point for many open-source PostgreSQL extensions
 * [plpgsql\_check](https://github.com/okbob/plpgsql_check) - Extension that allows to check plpgsql source code.
 * [PostGIS](http://postgis.net/) - Spatial and Geographic objects for PostgreSQL.
 * [PG_Themis](https://github.com/cossacklabs/pg_themis) - Postgres binding as extension for crypto library Themis, providing various security services on PgSQL's side.
@@ -97,7 +97,7 @@ A curated list of awesome PostgreSQL software, libraries, tools and resources, i
 * [PoWA](http://dalibo.github.io/powa/) - PostgreSQL Workload Analyzer gathers performance stats and provides real-time charts and graphs to help monitor and tune your PostgreSQL servers.
 
 ### Utilities
-* [apgdiff](http://www.apgdiff.com/) - Compares two database dump files and creates output with DDL statements that can be used to update old database schema to new one.
+* [apgdiff](https://www.apgdiff.com/) - Compares two database dump files and creates output with DDL statements that can be used to update old database schema to new one.
 * [ERAlchemy](https://github.com/Alexis-benoist/eralchemy) - ERAlchemy generates Entity Relation (ER) diagram from databases.
 * [mysql-postgresql-converter](https://github.com/lanyrd/mysql-postgresql-converter) - Lanyrd's MySQL to PostgreSQL conversion script.
 * [ora2pg](http://ora2pg.darold.net) - Perl module to export an Oracle database schema to a PostgreSQL compatible schema.
@@ -117,7 +117,7 @@ A curated list of awesome PostgreSQL software, libraries, tools and resources, i
 * [PostgREST](https://github.com/begriffs/postgrest) - Serves a fully RESTful API from any existing PostgreSQL database.
 * [yoke](https://github.com/nanopack/yoke) - PostgreSQL high-availability cluster with auto-failover and automated cluster recovery.
 * [pglistend](https://github.com/kabirbaidhya/pglistend) - A lightweight PostgresSQL `LISTEN`/`NOTIFY` daemon built on top of `node-postgres`.
-* [ZSON](https://github.com/afiskon/zson) - PostgreSQL extension for transparent JSONB compression
+* [ZSON](https://github.com/postgrespro/zson) - PostgreSQL extension for transparent JSONB compression
 
 ### Language bindings
 * Common Lisp: [Postmodern](https://github.com/marijnh/Postmodern)