# Overledger release notes: 2021

**15 December 2021**  
**[Overledger 2.1.5](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.5.pdf)** Is a maintenance release.

**17 November 2021**  
**[Overledger 2.1.4](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.4.pdf)** Continues growth path with four enhancements.

**2 November 2021**  
**[Overledger 2.1.3](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.3.pdf)** Includes significant enhancements.

**15 October 2021**  
**[Overledger 2.1.2](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.2.pdf)** Is a scalability release.

**21 September 2021**  
**[Overledger 2.1.1](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.1.pdf)** Is a maintenance release.

**13 September 2021**  
**[Overledger 2.1.0](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.1.0.pdf)** Launches Overledger Network.

**1 September 2021**  
**[Overledger 2.0.5](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.5.pdf)** Make ERC20 token payments directly via our payment API.

**2 August 2021**  
**[Overledger 2.0.4](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.4.pdf)** Introduces enhanced search API functionality.

**23 July 2021**  
**[Overledger 2.0.3](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.3.pdf)** Launches the demo app.

**30 June 2021**  
**[Overledger 2.0.2](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.2.pdf)** Introduces standardised invoke smart contract APIs.

**4 June 2021**  
**[Overledger 2.0.1](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.1.pdf)** Contains four new API extensions.

**27 April 2021**  
**[Overledger 2.0](/content/assets/uploads/2023/04/Quant_ReleaseNotes_OVL_V2.0.pdf)** Is a full release.

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## Other releases