diff --git a/packages/mirage-unikernel-caldav-hvt.0.0.1/opam b/packages/mirage-unikernel-caldav-hvt.0.0.1/opam
index f338cc7..0cbc16d 100644
--- a/packages/mirage-unikernel-caldav-hvt.0.0.1/opam
+++ b/packages/mirage-unikernel-caldav-hvt.0.0.1/opam
@@ -10,7 +10,7 @@ depends: [ "arp" { >= "3.0.0" & < "4.0.0"}
            "functoria-runtime" 
            "git-mirage" { >= "3.7.0" & < "3.7.1"}
            "icalendar" { >= "0.1.3"}
-           "irmin-git" { >= "2.10.0"}
+           "irmin-git" { >= "2.10.0" & < "3.0.0"}
            "irmin-mirage-git" { >= "2.10.0"}
            "lwt" 
            "mimic" 
diff --git a/packages/mirage-unikernel-caldav-le-monitoring-hvt.0.0.1/opam b/packages/mirage-unikernel-caldav-le-monitoring-hvt.0.0.1/opam
index c9ef469..387eb7a 100644
--- a/packages/mirage-unikernel-caldav-le-monitoring-hvt.0.0.1/opam
+++ b/packages/mirage-unikernel-caldav-le-monitoring-hvt.0.0.1/opam
@@ -11,7 +11,7 @@ depends: [ "arp" { >= "3.0.0" & < "4.0.0"}
            "functoria-runtime" 
            "git-mirage" { >= "3.7.0" & < "3.7.1"}
            "icalendar" { >= "0.1.3"}
-           "irmin-git" { >= "2.10.0"}
+           "irmin-git" { >= "2.10.0" & < "3.0.0"}
            "irmin-mirage-git" { >= "2.10.0"}
            "logs-syslog" { >= "0.3.0"}
            "lwt" 
diff --git a/packages/mirage-unikernel-caldav-monitoring-hvt.0.0.2/opam b/packages/mirage-unikernel-caldav-monitoring-hvt.0.0.2/opam
index 0c3d426..f09b71e 100644
--- a/packages/mirage-unikernel-caldav-monitoring-hvt.0.0.2/opam
+++ b/packages/mirage-unikernel-caldav-monitoring-hvt.0.0.2/opam
@@ -10,7 +10,7 @@ depends: [ "arp" { >= "3.0.0" & < "4.0.0"}
            "functoria-runtime" 
            "git-mirage" { >= "3.7.0" & < "3.7.1"}
            "icalendar" { >= "0.1.3"}
-           "irmin-git" { >= "2.10.0"}
+           "irmin-git" { >= "2.10.0" & < "3.0.0"}
            "irmin-mirage-git" { >= "2.10.0"}
            "logs-syslog" { >= "0.3.0"}
            "lwt"