diff --git a/master_changes.md b/master_changes.md
index 85d5aab9514..1402e7300e1 100644
--- a/master_changes.md
+++ b/master_changes.md
@@ -77,6 +77,7 @@ users)
 ## Release scripts
 
 ## Install script
+  * Add `2.6.0~beta1` [#7099 @kit-ty-kate]
 
 ## Admin
 
diff --git a/shell/install.ps1 b/shell/install.ps1
index 0f6006b1e78..523de300bb2 100644
--- a/shell/install.ps1
+++ b/shell/install.ps1
@@ -20,7 +20,7 @@ param (
   [string]$OpamBinDir = $null
 )
 
-$DevVersion = "2.6.0~alpha1"
+$DevVersion = "2.6.0~beta1"
 $IsAdmin = (New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
 $DefaultBinDir = If ($IsAdmin) {"$Env:ProgramFiles\opam\bin"} Else {"$Env:LOCALAPPDATA\Programs\opam\bin"}
 
@@ -48,6 +48,7 @@ $SHA512s = @{
   "opam-2.5.1-x86_64-windows.exe"        = "a9bdece78b12948baf3524742c6f69f85b2dc87ad00f85294301eaac9bb33b1f5497639eee5d87bf43a6570c8250d58152d450eb3c441f4901465f61e2e32d09";
   "opam-2.5.2-x86_64-windows.exe"        = "fd7f42a0b91787a62ba09ad8dc6bca0c474645f8ceb036df0453df12f1287f43534041dd453869e064662582f4e1d5342c70463422d310fcc9f2cf4a743d8640";
   "opam-2.6.0-alpha1-x86_64-windows.exe" = "38cccf73cd2822376c5badd60eed52c8e60ad0cb77b30299a97f567f8cc7a2d6cb0ecc41898e002022186446069d72071e2b3e2e9ea65aa95e7fdd7d59e52ff4";
+  "opam-2.6.0-beta1-x86_64-windows.exe"  = "79d5a6131168320839734f5df0e77e34711e3cf10e6195bbac923dc4e8f7707f613720a2150781d6846c8fc4f437d5fa8c188f04f36bd5e31a9b1e5cfed801c5";
 }
 
 Function DownloadAndCheck {
diff --git a/shell/install.sh b/shell/install.sh
index d1d697d65e9..8451eeb086b 100755
--- a/shell/install.sh
+++ b/shell/install.sh
@@ -6,7 +6,7 @@ set -ue
 # (c) Copyright Louis Gesbert OCamlPro 2014-2017
 
 VERSION='2.5.2'
-DEV_VERSION='2.6.0~alpha1'
+DEV_VERSION='2.6.0~beta1'
 DEFAULT_BINDIR=/usr/local/bin
 
 bin_sha512() {
@@ -521,6 +521,19 @@ bin_sha512() {
     opam-2.6.0-alpha1-x86_64-netbsd)  echo "993d695c5eba89975b090635c59a0efa8a5aa621a4a88a0323eb666c1fec0d1d8a5bea971e59a38d59723a3ba232bf197ff96912f41165c6234bedfa6fed9c12";;
     opam-2.6.0-alpha1-x86_64-openbsd) echo "91c5fbaba7f1c1d74e99ae47ab26ffce5138153a41bd40818646d83f191da87c1956069d3e5a2b85146caa141a6d1d36e73373545bd498d36e66f0c4bae3f31a";;
 
+    opam-2.6.0-beta1-arm64-linux)     echo "d7fdfe95ef159534883482a2d2d19c9151d4338bb103871945e52de568c0c6421b8189fb3b0cafcbb474fa75da1ecdcd5ed2737a97870bece78d31bca03f3ace";;
+    opam-2.6.0-beta1-arm64-macos)     echo "48059dadc769160625299914946798c2bf080a32af8506ca6866098c8ce90f2015b671e82101023b9bab5fe71235abdd69b0b77f579ca3ff68ec6f447cfc9fee";;
+    opam-2.6.0-beta1-armhf-linux)     echo "7c040d00ba236c3dc37400424a971d932563b18642a1e18042b1fa7204fc4deecc0055cbc5eaa66bf6838955b26eafbd54ab7cc9a58b9cd073cc1ddf2b4ff349";;
+    opam-2.6.0-beta1-i686-linux)      echo "8c0770317b7edf0823f7eb64dba7cbaabe305d715e54dc36483aaf979cffab701734a033b705ffd2206e6f123a4f259dc8ed5aa834d245e6ae7b389fe783c7dc";;
+    opam-2.6.0-beta1-ppc64le-linux)   echo "a244fc99d80477bd33f023f767f51855f5394c8740c4885462b5dc50c995dd0ae2de204e06536222dd7e19af1e745ffd62aa53b950dbfec1af73a42d764dd2a9";;
+    opam-2.6.0-beta1-riscv64-linux)   echo "0afb42181e361d0727f6951bc66a6284aa260ddf1eafbc2b2386d6d1a4582c9e95510c28d023a0570d2d2bf32715e51c71cb21c9d022dc1d01cb1af5185bcb7a";;
+    opam-2.6.0-beta1-s390x-linux)     echo "64583fe061c4c09be25fa46a197b7a95bcc269b8da8884f6ceeab3987b16d414aeed933f7532e8814fe52b716ad15e3f06ba799ee16a13aec64068a0a13e996c";;
+    opam-2.6.0-beta1-x86_64-freebsd)  echo "6b34d96e50178335892719bcf1030de9640e531210253424ef7ac2cdb9999f57856417b6da9bc0b73fad56cd958ae12e48f4da23c3a5d8d3bd88fd01de73609f";;
+    opam-2.6.0-beta1-x86_64-linux)    echo "1fb6aba96b6ea55d4e8c22add8288ee7cca3c17fefd33f2067360823ed9679bbdb0bc7d7937ddbb9579c7d0a48a9a390272bb62ae258c1b49a2f179da430afd5";;
+    opam-2.6.0-beta1-x86_64-macos)    echo "7cd58924bc2ec8a603e4962bfc9ba3c59db2c4c25635af7c22ad6c803e0e3f88a8d2803f8353a385413fb3c9520afbffb2cf5e1a96d95269dfd917d62e9dea36";;
+    opam-2.6.0-beta1-x86_64-netbsd)   echo "a08d45136c2b7ef4258d7c270e48156af9c353336636a079c7d2374acfefd7106216557633e94a68a71c25b42ac906f5304a0ba83c943071c3bbc9bbea2674eb";;
+    opam-2.6.0-beta1-x86_64-openbsd)  echo "6fbcdc9c8a40a6a47af9dcb4c930659e3e396a21264d77db7706733f0f6a8db1ae7814db989be32a1828e1e37256df3b770f8699338e0ba64e796ef9308a205b";;
+
     *) echo "no sha";;
   esac
 }