diff --git a/requirements-dev.in b/requirements-dev.in
index 49324f71abfcf81e6b76d7508e42b140375dc31a..df336e27cad80e018509387f472be5b15d786bbc 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -13,5 +13,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-git+https://osm.etsi.org/gerrit/osm/IM.git@master#egg=osm-im
--r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+git+https://osm.etsi.org/gerrit/osm/IM.git@v15.0#egg=osm-im
+-r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
diff --git a/requirements-dev.txt b/requirements-dev.txt
index c37b8cb20228fcf56375f17f8a8fdd4c4f7903dc..5fe239ec39ca7bb6052e42c4ba8e2e055c237663 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -16,28 +16,28 @@
 #######################################################################################
 enum34==1.1.10
     # via
-    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
     #   pyangbind
 lxml==4.9.3
     # via
-    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
     #   pyang
     #   pyangbind
-osm-im @ git+https://osm.etsi.org/gerrit/osm/IM.git@master
+osm-im @ git+https://osm.etsi.org/gerrit/osm/IM.git@v15.0
     # via -r requirements-dev.in
 pyang==2.5.3
     # via
-    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
     #   pyangbind
 pyangbind==0.8.3.post1
-    # via -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    # via -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
 pyyaml==6.0.1
-    # via -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    # via -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
 regex==2023.8.8
     # via
-    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
     #   pyangbind
 six==1.16.0
     # via
-    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=master
+    #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v15.0
     #   pyangbind