qt5core.dll bad signature

Had this since 1.3.959 (at least)
currently on 1.3.1073

Our new virus checker is now blocking the program

File Path : c:\program files\rstudio\bin\qt5core.dll
PID(s) during check : 10656,13120,13916,14820
Verification Status : 2148098064
Status Description : TRUST_E_BAD_DIGEST - The digital signature of the object did not verify.

1 : 
    Subject     : C=FI, S=Oulu, L=Oulu, O=The Qt Company Oy, CN=The Qt Company Oy
    Issuer      : C=US, O="thawte, Inc.", CN=thawte SHA256 Code Signing CA
    Serial      : 06e9579aab763e72079989c689d2b42d
    Thumbprint  : a880f2a85e26479432facee768822543ec25dd8c
    Not Before  : 2017-09-18
    Not After   : 2020-11-24
2 : 
    Subject     : C=US, O="thawte, Inc.", CN=thawte SHA256 Code Signing CA
    Issuer      : C=US, O="thawte, Inc.", OU=Certification Services Division, OU="(c) 2006 thawte, Inc. - For authorized use only", CN=thawte Primary Root CA
    Serial      : 71a0b73695ddb1afc23b2b9a18ee54cb
    Thumbprint  : d00cfdbf46c98a838bc10dc4e097ae0152c461bc
    Not Before  : 2013-12-10
    Not After   : 2023-12-09

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