2025 has ended but the content has not! The last content release of 2025 is a fitting finale, bringing another round of meaningful additions that expand what you can discover across legal history, international affairs, and the everyday realities of the legal profession. Consider it our year-end gift to researchers everywhere, no batteries required, just better sources.

Inside, you’ll find fresh material that reflects the issues shaping the world right now, alongside foundational documents that reveal how institutions, agreements, and legal systems were built, challenged, and reshaped over time. Whether you are working through a modern question with global implications or chasing the long arc of precedent, these updates help widen the lens and sharpen the details. Scroll on for December 2025’s curated highlights.

Major Database Expansions

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Major Database & Collection Expansions

Bar Journals Library – New Bar Journal Added!

Expanded state and city bar coverage strengthens practitioner-focused research

Updated: 23 titles
Added: 1 title

The Bar Journals Library offers a uniquely practical view into the legal profession, preserving practitioner-driven analysis of evolving doctrine, ethics, procedure, and the real-world issues shaping law at the state and local level. This month’s updates include a key bar journal addition, Wyoming Lawyer, and expands access to key state and city bar publications, strengthening the historical and professional snapshot of how attorneys and bar leaders have documented legal change and emerging challenges over time.

• Wyoming Lawyer

United Nations Law Collection

Core treaty and institutional resources expanded for international legal research

The United Nations Law Collection remains a cornerstone resource for international legal research, bringing together the treaty publications and institutional records that shape the modern global legal order. This month’s updates enhance access to the primary sources most frequently relied upon in scholarship and practice, expanding key treaty and procedural materials that help researchers trace how international obligations are formed, applied, and interpreted through UN institutions and international adjudication.

Updated: 7 titles
Added: 7 titles

• United Nations Treaty Series
• Repertoire of the Practice of the Security Council
• Racing towards Risk: The Hidden Costs of Nuclear Arms Build-Up

Organization of American States (OAS) – New Database!

New documents unlock regional policy, treaty history, and institutional action

Updated: 7 titles
Added: 30 titles

As HeinOnline’s newest database, the Organization of American States (OAS) collection continues to reveal the depth of the inter-American system through official publications and historical records that document diplomacy, democracy, and regional cooperation across the Western Hemisphere. This month’s additions strengthen coverage of the OAS’s institutional work in human rights, legal development, and security, adding key documentation that supports research into regional governance, international commitments, and democratic challenges unfolding across the Americas today.

• Impact of Digital Surveillance on Freedom of Expression in the Americas
• Comite Interamericano contra el Terrorismo: Subcomision sobre los Controles Financieros
• Capacidades y Desafios en Ciberseguridad de Organizaciones que Trabajan por los Derechos de las Mujeres

State Constitutions Illustrated

Fresh amendment texts and supporting materials keep states fully up to date

Added: 3 titles

State Constitutions Illustrated continues to deliver one of the most reliable ways to track constitutional change at the state level, preserving both current and historical texts alongside the supporting materials that put amendments into context. This update is especially timely, adding dozens of new current documents since December 2024 and bringing all states fully up to date through the November 4, 2025 elections, including new amendment texts, legislative materials, and voter-facing documents that support research into elections, governance, taxation, and public policy.

• Texas: Added extensive 2025 constitutional amendments, including measures on bail eligibility, taxation limits, property tax exemptions, workforce and infrastructure funding, and voting eligibility.
• California: Added Proposition 50, updating constitutional text to allow a new legislature-drawn congressional district map for the 2026–2030 cycles.
• Washington: Added SJR 8201 and supporting materials, updating constitutional text to allow the Long-Term Services and Supports Trust Fund to be invested in equities.

U.S. State Commitments with Foreign Governments- 2025 AALL New Product Award Winner!

AALL award winner receives major commitment expansion

Added: 498 titles

Fresh off winning the 2025 AALL New Product Award, this groundbreaking collection just received a major expansion with nearly 500 additional commitments added, including more than 200 from before 2000. The new material vividly shows how state-level diplomacy shapes real-world policy, from agreements with Mexico tied to Vienna Convention consular compliance to trade-focused commitments with the United Kingdom and wide-ranging cooperation with Ukraine, alongside a wave of climate, clean energy, and supply-chain era agreements. Together, these additions cement the database as the most comprehensive public record of state-to-foreign-government cooperation anywhere.

• Memoranda of understanding with Mexico ensuring state compliance with the Vienna Convention on Consular Relations
• Agreements with the United Kingdom to expand trade relations
• Arrangements with Ukraine promoting cooperation in transportation, agriculture, trade, robotics, and defense

More HeinOnline Updates, Delivered Monthly

Want these updates in your inbox? December’s release is just one snapshot of what’s new on HeinOnline. If you’d like a simple way to stay on top of fresh content as it’s added, along with new features, database launches, major platform updates, upcoming tradeshow meetings, and publication changes, our newsletter pulls it all together in one quick monthly read.

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