diff --git a/dune-project b/dune-project
index e1a4296..b4c8716 100644
--- a/dune-project
+++ b/dune-project
@@ -25,7 +25,7 @@
    (>= 4.14))
   (sexplib0
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))))
 
 (package
@@ -33,46 +33,46 @@
  (synopsis "Tests for provider")
  (depends
   (ocaml
-   (>= 5.2))
+   (>= 4.14))
   (base
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (expect_test_helpers_core
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_compare
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_enumerate
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_expect
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_hash
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_here
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_let
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_sexp_conv
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppx_sexp_value
    (and
-    (>= v0.17)
+    (>= v0.16)
     (< v0.18)))
   (ppxlib
    (>= 0.33))
diff --git a/provider-tests.opam b/provider-tests.opam
index b400881..02f13d6 100644
--- a/provider-tests.opam
+++ b/provider-tests.opam
@@ -9,17 +9,17 @@ doc: "https://mbarbin.github.io/provider/"
 bug-reports: "https://github.com/mbarbin/provider/issues"
 depends: [
   "dune" {>= "3.16"}
-  "ocaml" {>= "5.2"}
-  "base" {>= "v0.17" & < "v0.18"}
-  "expect_test_helpers_core" {>= "v0.17" & < "v0.18"}
-  "ppx_compare" {>= "v0.17" & < "v0.18"}
-  "ppx_enumerate" {>= "v0.17" & < "v0.18"}
-  "ppx_expect" {>= "v0.17" & < "v0.18"}
-  "ppx_hash" {>= "v0.17" & < "v0.18"}
-  "ppx_here" {>= "v0.17" & < "v0.18"}
-  "ppx_let" {>= "v0.17" & < "v0.18"}
-  "ppx_sexp_conv" {>= "v0.17" & < "v0.18"}
-  "ppx_sexp_value" {>= "v0.17" & < "v0.18"}
+  "ocaml" {>= "4.14"}
+  "base" {>= "v0.16" & < "v0.18"}
+  "expect_test_helpers_core" {>= "v0.16" & < "v0.18"}
+  "ppx_compare" {>= "v0.16" & < "v0.18"}
+  "ppx_enumerate" {>= "v0.16" & < "v0.18"}
+  "ppx_expect" {>= "v0.16" & < "v0.18"}
+  "ppx_hash" {>= "v0.16" & < "v0.18"}
+  "ppx_here" {>= "v0.16" & < "v0.18"}
+  "ppx_let" {>= "v0.16" & < "v0.18"}
+  "ppx_sexp_conv" {>= "v0.16" & < "v0.18"}
+  "ppx_sexp_value" {>= "v0.16" & < "v0.18"}
   "ppxlib" {>= "0.33"}
   "provider" {= version}
   "odoc" {with-doc}
diff --git a/provider.opam b/provider.opam
index 75d2d81..5932e0c 100644
--- a/provider.opam
+++ b/provider.opam
@@ -10,7 +10,7 @@ bug-reports: "https://github.com/mbarbin/provider/issues"
 depends: [
   "dune" {>= "3.16"}
   "ocaml" {>= "4.14"}
-  "sexplib0" {>= "v0.17" & < "v0.18"}
+  "sexplib0" {>= "v0.16" & < "v0.18"}
   "odoc" {with-doc}
 ]
 build: [