diff --git a/conda/bob-devel/meta.yaml b/conda/bob-devel/meta.yaml
index d29765d9d59fbf11fb2f5215a6512642b4b95bd2..5726678af92b97b7eef98ff4ba839008137c8309 100644
--- a/conda/bob-devel/meta.yaml
+++ b/conda/bob-devel/meta.yaml
@@ -59,6 +59,7 @@ requirements:
     - ncurses 6.2
     - nose 1.3.7
     - numpy 1.19.2
+    - opencv 4.5.0
     - pandas 1.1.3
     - pillow 8.0.1
     - pkg-config 0.29.2
diff --git a/conda/opencv/meta.yaml b/conda/opencv/meta.yaml
index a623db3f5c0e939e19b0dbc05e2ec8ce9343cd02..52cb5b59316a0be62224625b11d5f50b9437a679 100644
--- a/conda/opencv/meta.yaml
+++ b/conda/opencv/meta.yaml
@@ -41,7 +41,7 @@ source:
     sha256: 78884f64b564a3b06dc6ee731ed33b60c6d8cd864cea07f21d94ba0f90c7b310  # [unix]
 
 build:
-  number: 0
+  number: 1
   string: py{{ PY_VER_MAJOR }}{{ PY_VER_MINOR }}h{{ PKG_HASH }}_{{ PKG_BUILDNUM }}
   run_exports:
     # https://abi-laboratory.pro/index.php?view=timeline&l=opencv