diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a8d2bac..e978604 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,15 @@
 name: CI
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+    tags: '*'
+  pull_request:
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -11,8 +19,7 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.7'
-          - "^1.8.0-0"
+          - '1.8'
           - 'nightly'
         os:
           - ubuntu-latest
diff --git a/Project.toml b/Project.toml
index f721af1..fc831cc 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "ConstraintDomains"
 uuid = "5800fd60-8556-4464-8d61-84ebf7a0bedb"
 authors = ["Jean-François Baffier"]
-version = "0.3.4"
+version = "0.3.5"
 
 [deps]
 ConstraintCommons = "e37357d9-0691-492f-a822-e5ea6a920954"
diff --git a/src/continuous.jl b/src/continuous.jl
index 1231f0a..dbd7407 100644
--- a/src/continuous.jl
+++ b/src/continuous.jl
@@ -8,8 +8,8 @@ abstract type ContinuousDomain{T<:Real} <: AbstractDomain end
     Intervals{T <: Real} <: ContinuousDomain{T}
 An encapsuler to store a vector of `PatternFolds.Interval`. Dynamic changes to `Intervals` are not handled yet.
 """
-struct Intervals{T<:Real,L,R} <: ContinuousDomain{T}
-    domain::Vector{Interval{T,L,R}}
+struct Intervals{T<:Real,I<:Interval{T}} <: ContinuousDomain{T}
+    domain::Vector{I}
 end
 
 """
@@ -76,8 +76,14 @@ function merge_domains(d1::D, d2::D) where {D<:ContinuousDomain}
 end
 
 function intersect_domains(i₁::I1, i₂::I2) where {I1<:Interval,I2<:Interval}
-    a = a_ismore(i₁, i₂) ? i₁.a : i₂.a
-    b = b_isless(i₁, i₂) ? i₁.b : i₂.b
+    if i₁.first > i₂.first
+        return intersect_domains(i₂, i₁)
+    end
+    if i₁.last < i₂.first
+        return domain()
+    end
+    a = i₂.first
+    b = min(i₁.last, i₂.last)
     return Interval(a, b)
 end
 
diff --git a/src/explore.jl b/src/explore.jl
index 35804d5..cd60ce7 100644
--- a/src/explore.jl
+++ b/src/explore.jl
@@ -15,40 +15,36 @@ function ExploreSettings(
     return ExploreSettings(complete_search_limit, max_samplings, search, solutions_limit)
 end
 
-function _explore(domains, concept, param, s, ::Val{:partial})
+function _explore(domains, f, s, ::Val{:partial})
     solutions = Set{Vector{Int}}()
     non_sltns = Set{Vector{Int}}()
 
     sl = s.solutions_limit
 
-    f = isnothing(param) ? ((x; param = p) -> concept(x)) : concept
-
     for _ in 1:s.max_samplings
         length(solutions) ≥ sl && length(non_sltns) ≥ sl && break
         config = map(rand, domains)
-        c = f(config; param) ? solutions : non_sltns
+        c = f(config) ? solutions : non_sltns
         length(c) < sl && push!(c, config)
     end
     return solutions, non_sltns
 end
 
-function _explore(domains, concept, param, ::ExploreSettings, ::Val{:complete})
+function _explore(domains, f, ::ExploreSettings, ::Val{:complete})
     solutions = Set{Vector{Int}}()
     non_sltns = Set{Vector{Int}}()
 
-    f = isnothing(param) ? ((x; param = p) -> concept(x)) : concept
-
     configurations = Base.Iterators.product(map(d -> get_domain(d), domains)...)
     foreach(
-        c -> (cv = collect(c); push!(f(cv; param) ? solutions : non_sltns, cv)),
+        c -> (cv = collect(c); push!(f(cv) ? solutions : non_sltns, cv)),
         configurations,
     )
     return solutions, non_sltns
 end
 
-function _explore(domains, concept, param, s, ::Val{:flexible})
+function _explore(domains, f, s, ::Val{:flexible})
     search = s.max_samplings < s.complete_search_limit ? :complete : :partial
-    return _explore(domains, concept, param, s, Val(search))
+    return _explore(domains, f, s, Val(search))
 end
 
 """
@@ -67,8 +63,9 @@ Beware that if the density of the solutions in the search space is low, `solutio
 function explore(
     domains,
     concept;
-    param=nothing,
     settings = ExploreSettings(domains),
+    parameters...
 )
-    return _explore(domains, concept, param, settings, Val(settings.search))
+    f = x -> concept(x; parameters...)
+    return _explore(domains, f, settings, Val(settings.search))
 end
diff --git a/src/general.jl b/src/general.jl
index 7fd60eb..60798d6 100644
--- a/src/general.jl
+++ b/src/general.jl
@@ -2,12 +2,12 @@ Base.eltype(::D) where {T, D <: Union{DiscreteDomain{T}, ContinuousDomain{T}}} =
 
 function Base.convert(::Type{Intervals}, d::RangeDomain{T}) where {T <: Real}
     a, b = extrema(get_domain(d))
-    return domain((Float64(a), true), (Float64(b), true))
+    return domain(Float64(a)..Float64(b))
 end
 
 function Base.convert(::Type{RangeDomain}, d::Intervals{T}) where {T <: Real}
     i = get_domain(d)[1]
-    a = Int(value(i, :a) + (closed(i, :a) ? 0 : 1))
-    b = Int(value(i, :b) - (closed(i, :b) ? 0 : 1))
+    a = Int(i.first)
+    b = Int(i.last)
     return domain(a:b)
 end